admin
05-13-2024, 08:14 PM
Chevy Block Casting Numbers
Use these casting numbers to identify the block you have.
Small Block Casting numbers
Casting Number
Years
CID
Comments
330817
70-80
400
Car & Truck 2 & 4-bolt 3-freeze plugs
355909
75-79
262/305
car & Truck 2-bolt
360851
75-76
262
2-bolt
361979
76-79
305
car & Truck 2-bolt
366245
78-82
350
Bowtie High tin 4-bolt
366286
82
350
Bowtie aluminum 4-bolt siamesed
366287
82
350
Bowtie aluminum 4-bolt siamesed
366299
82
350
Bowtie aluminum 4-bolt
389257
67
302
2-bolt
391436
68-73
307
2-bolt
393288
65-67
283
2-bolt
460703
78
350
4-bolt
460776
76-79
305
Car & Truck 2-bolt
460777
76-79
305
Car & Truck 2-bolt
460778
76-79
305
2-bolt
471511
79-82
267
Car & Truck 2-bolt
3556519
58-61
283
2-bolt
3703524
55
265
car & Corvette no oil filter 2-Bolt
3720991
55-56
265
Car & Truck 2-bolt
3731548
57
283
Car & Truck 2-bolt No side mount
3737737
57-62
283
2-bolt
3737739
57-62
283
2-bolt
3756519
58-62
283
2-bolt
3782870
62-67
327
car & Truck 2-bolt
3789817
62-67
327
2-bolt
3789935
61-66
283
car & Truck 2-bolt
3790721
64-67
327
2-bolt Chevy II Nova Recessed filter
3791362
66-67
327
2-bolt Chevy II Nova Recessed filter
3791363
66-67
327
2-bolt Chevy II Nova Recessed filter
3792563
65
327
2-bolt
3792582
64-65
283
2-bolt
3794226
57-63
283
2-boltTruck
3794460
68-69
327
2-bolt
3814660
68-69
327
2-bolt
3830944
63
327
2-bolt
3834810
65-67
283
car & Truck 2-bolt
3834812
62-63
283
2-bolt
3837739
58-62
283
2-bolt
3849852
57-66
283
car & Truck 2-bolt
3849859
57-66
283
car & Truck 2-bolt
3849935
65-67
283
2-bolt
3858174
64-67
327
car & Truck 2-bolt
3858180
64-67
327
2-bolt
3858618
68-76
350
2 & 4-Bolt
3862194
65-67
283
2-bolt Chevy II Nova Recessed filter
3864812
62-67
283
car & Truck 2-bolt
3892657
64-67
302/327/350
car & Truck 2-bolt
3892659
68-69
327
2-bolt Large journal
3896944
67
283
2-bolt
3896948
66-67
283
2-bolt
3903352
67
327
2-bolt
3914635
68-73
307
car & Truck 2-bolt
3914636
68-73
307
car & Truck 2-bolt
3914638
68
327
2-bolt
3914653
68
307
2-bolt
3914660
68-69
327
car & Truck 2-bolt
3914678
68-79
302/327/350
car & Truck 2-bolt
3931174
68
307
2-bolt Truck
3932371
69-73
307
car & Truck 2-bolt
3932373
69-73
307
car & Truck 2-bolt
3932386
68-74
302-327-350
2 & 4-Bolt
3932388
68-79
350
car & Truck 4-Bolt
3932442
67
350
2-bolt Camaro
3933180
68-69
327
car & Truck Large journal 2-Bolt
3951509
70-80
400
car & Truck 2 & 4-Bolt 2-freeze plugs
3951511
70-80
400
car & Truck 2 & 4-Bolt 3-freeze plugs
3956618
68-79
302/327/350
2 & 4-Bolt
3956632
69-73
307
car & Truck 2-bolt
3959512
62-63
327
2-bolt
3970010
69-79
302/350
car & Truck 2 & 4-Bolt Most common
3970014
68-79
350
car & Truck 2 & 4-Bolt
3970020
69-73
307
car & Truck 2-bolt
3970024
69-73
307
car & Truck 2-bolt
3992386
68-69
327
car & Truck Large journal 2-Bolt
10036033
350
4-bolt Mexico cast Crate engine
10051182
350
Car and Truck 2 & 4-bolt 1 Piece Seal Passenger stick
10051184
86-up
350
Car & Truck 2 & 4-bolt Passenger stick 1-piece seal
10054727
86-up
350
Car & Truck 2-bolt Passenger stick 1-piece seal
10066036
86-up
350
Car & Truck 2 & 4-bolt Passenger stick 1-piece seal
10066038
350
2 & 4-Bolt Mexico cast Crate engine
10090511
90
350
4-bolt LT-5 ZR-1
10125327
93-up
350
Camaro/firebird 2 & 4-bolt LT-1 Reverse cooling Roller cam
10134996
400
4-bolt Bowtie Aluminum 400 Mains/Bore
10153558
91-92
350
4-bolt LT-5 ZR-1
10168588
94-96
265
2-bolt LT-1 Reverse cooling
10199001
93-95
350
4-bolt LT-5 ZR-1
10243878
96-up
305
2-bolt Vortec Roller
10243880
96-up
350
2 & 4-Bolt Vortec Roller
12550592
97-up
350
Crossbolted LS-1 Aluminum
12551364
98 & UP
365
Gen III 6.0L Iron Block. LQ-4 and LQ-9
12559378
97-up
350
Crossbolted LS-1 Aluminum
12559846
97-up
350
Crossbolted LS-1 Aluminum
12560621
97-up
350
Crossbolted LS-1 Aluminum
12560629
97-up
350
Crossbolted LS-1 Aluminum
12561168
97-up
350
Crossbolted LS-1 Aluminum
12561358
99 & UP
293/325
Gen III 4.8L and 5.3L Iron Block.
12562174
97-up
350
Crossbolted LS-1 Aluminum
12573581
98 & UP
365
Gen III 6.0L Iron Block. LQ-4 and LQ-9
12577184
98 & UP
365
Gen III 6.0L Iron Block. LQ-4 and LQ-9
14010201
80-85
305
car & Truck 2-bolt Passenger stick
14010202
80-85
305
car & Truck 2-bolt Passenger stick
14010203
80-85
305
car & Truck 2-bolt Passenger stick
14010205
80-82
267
car & Truck 2-bolt Passenger stick
14010207
80-85
350
car & Truck 2 & 4-Bolt Passenger stick
14010209
80-85
350
car & Truck 2 & 4-Bolt Passenger stick
14010280
80-82
267
car & Truck 2-bolt Passenger stick
14010287
80-82
350
2-bolt Passenger stick
14011064
80-85
350
4-bolt Passenger stick
14011148
87-89
350
2 & 4-Bolt Roller cam one piece seal
14016376
80-82
267
2-bolt Passenger stick
14016379
77-79
350
2 & 4-Bolt
14016379
77-79
267
2-bolt dipstick in pan
14016381
76-85
305
car & Truck 2-bolt Passenger stick After 79
14016382
80-85
305
2-bolt Passenger stick
14016383
80-85
305
2-bolt Truck
14079287
86-90
350
2-bolt Passenger stick one piece seal
14088526
87-89
350
2-bolt Roller cam Passenger stick 1-piece seal
14088548
86-88
350
2-bolt Truck Passenger stick 1-piece seal
14088551
86-88
305
Car & Truck 2-bolt Passenger stick 1-piece seal
14093627
87-88
305
Car & Truck 2-bolt Passenger stick 1-piece seal
14093638
87-95
350
Car & Truck 2 & 4-bolt Passenger stick 1-piece seal
14094766
86-up
305
2-bolt Passenger stick one piece seal
14101147
86-up
305
2-bolt Passenger stick one piece seal
14101148
86-up
350
2 & 4-Bolt Passenger stick 1-Piece seal Roller cam
14102058
86-88
305
Car & Truck 2-bolt Passenger stick 1-piece seal
14316379
68-88
350
Car & Truck 2-bolt Passenger stick 1-piece seal
Big Block Casting numbers
Casting Number
Years
CID
Comments
340220
72-76
427
Truck Tall deck
345014
74-86
454
Truck
346236
74-76
454
2-bolt
359070
74-90
454
Truck
361959
73-85
454
Car & Truck
364776
68-84
427
Truck Tall deck
364779
68-88
366
Truck Tall deck
399204
70-71
509
4-Bolt Aluminum Can-AM
399289
73-79
454
2-bolt
399293
77-78
366
Truck
473478
68-84
427
Truck Tall deck
3716362
396
3732755
59-61
348
3732811
58
348
3751872
58
348
3755011
59-61
348
3771705
59-61
348
3782012
58-61
348
3782870
68-76
427
Truck Tall deck
3788068
62
409
3795623
61
409
3798962
62-65
348
Truck
3815707
58-61
348
3824553
66-67
366
Truck
3830814
63
409
3839752
62-63
409
3839754
65
409
3844422
64
409
3855961
66-67
396
2-bolt
3855962
65-66
396
4-Bolt
3855977
65-67
366
Truck Tall deck
3857651
409
Marine
3857655
62-65
348
Truck
3857656
65
409
3857658
409
Marine
3860386
62-64
409
3860387
58
348
3869942
66-67
427
2 & 4-Bolt
3873858
66
396
4-Bolt
3902406
67
396
2 & 4-Bolt
3902466
65-67
396
3904351
67
427
2 & 4-Bolt
3904354
66-67
366
Truck Tall deck
3916319
68-85
366
Truck Tall deck
3916321
68
427
2 & 4-Bolt
3916323
68
396
2 & 4-Bolt
3918319
66-70
366
Truck
3925521
68-85
366
Truck Tall deck
3935439
68-69
427
2 & 4-Bolt
3935440
68-69
396
2 & 4-Bolt
3937724
68-85
366
Truck Tall deck
3937726
68-84
427
Truck Tall deck
3946052
69
427
ZL-I Aluminum 4-Bolt
3946053
97
427
ZL-I Aluminum 4-Bolt 2nd design
3955270
69
427
2 & 4-Bolt
3955272
69
396/402
2 & 4-Bolt
3955274
68-85
366
Truck Tall deck
3955276
68-84
427
Truck Tall deck
3963512
69-71
427/454
2 & 4-Bolt COPO
3963513
73-76
454
3965440
68-69
396
3965449
68-72
396
3969852
68-84
366
Truck
3969854
69-72
396/402/454
2 & 4-Bolt
3969858
68-84
427
Truck Tall deck
3995623
61
409
3999289
72-78
454
Car & Truck 2-Bolt
3999290
72
402
2-bolt
3999293
68-85
366
Truck Tall deck
3999294
68-84
427
Truck Tall deck
6272176
68-76
366
Truck
6272177
72
402
2-bolt
6272181
73-76
427
Truck
10051107
454
4-Bolt Bowtie IV Short deck
10068286
90-91
454
4-Bolt IV Short deck
10069284
427
Truck
10114182
91-95
454
4-Bolt Gen-5
10114183
91-95
366
Truck Gen-5
10114184
91-95
427
Truck Gen-5
10134366
454
4-Bolt Gen-5 Bowtie Tall deck
10185050
454
4-Bolt Gen-5 Bowtie Short deck
10237297
96-up
454
4-Bolt Vortec 7400 Gen-6
10237300
96-up
502
4-Bolt 4.466 bore Gen-6
12550313
91-95
454
4-Bolt Gen-5
12556110
01-up
496
4-Bolt Vortec 8100 Gen-7
14015445
75-90
454
Car & Truck
14015543
87-90
454
4-Bolt Gen-5
14044807
454
4-Bolt IV Bowtie Tall deck
14096859
502
4-Bolt Gen-5
24502504
454
4-Bolt Gen-5 Bowtie Short deck
24502572
4-Bolt DRCE-2 Olds "9.5"" deck"
Crankshaft Identification
Use these casting numbers to identify the crankshaft you have.
Small Block Casting numbers
Casting Number
CID
Years
Journals
Stroke
Comments
1130
307/327
68-73
2.45/2.10
3.25
Nodular Iron
1178
302
2.45/2.10
3
Forged
1181
305/350
68-76
2.45/2.10
3.48
Nodular Iron
1182
350
2.45/2.10
3.48
Forged
2680
327
2.30/2.00
3.25
Forged
2690
350
2.45/2.10
3.48
Forged
3279
302
68-69
2.45/2.10
3
Forged
4577
327
62-67
2.3/2.0
3.25
Nodular Iron
4672
307/327
68-73
2.45/2.10
3.25
Nodular Iron
310514
350
77-85
2.45/2.10
3.48
Nodular Iron
330550
350
73-75
2.45/2.10
3.48
Forged
354431
262
75-76
2.45/2.10
3.1
Nodular Iron
3727449
283
57-67
2.3/2.0
3
Forged
3729449
265
55-57
2.3/2.0
3
Forged
3734627
327
62-67
2.3/2.0
3
Forged
3735236
265/283
55-67
2.3/2.0
3
Forged
3735263
283
57-63
2.3/2.0
3
Forged
3782680
327
62-67
2.3/2.0
3.25
Forged
3814671
327
2.30/2.00
3.25
Forged
3815822
265/283
55-67
2.3/2.0
3
Forged
3835236
283
57-65
2.3/2.0
3
Forged
3836266
265/283
56-63
2.3/2.0
3
Forged
3849847
283
57-67
2.3/2.0
3
Forged
3876764
283
64-67
2.3/2.0
3
Nodular Iron
3876768
283
64-67
2.3/2.0
3
Nodular Iron
3884577
327
2.30/2.00
3.25
Forged
3892690
350
68-85
2.45/2.10
3.48
Forged
3911001
307/327
68-73
2.45/2.10
3.25
Nodular Iron
3911011
307/327
68-73
2.45/2.10
3.25
Nodular Iron
3914672
327
2.45/2.10
3.25
Forged
3923279
302
2.45/2.10
3
Forged
3932442
305/350
69-85
2.45/2.10
3.48
Nodular Iron
3941174
307/327
68-73
2.45/2.10
3.25
Nodular Iron
3941178
302
68-69
2.45/2.10
3
Forged
3941182
350
68-76
2.45/2.10
3.48
Forged
3941188
350
2.45/2.10
3.48
Forged
3949847
283
64-67
2.3/2.0
3
Nodular Iron
3951130
327
2.45/2.10
3.25
Forged
3951529
400
70-80
2.65/2.10
3.75
Nodular Iron
10106122
350
90-95
2.76/2.10
3.66
Forged LT-5 ZR-1
10168568
265
2.45/2.10
3
Cast One Piece Seal
12552216
346
2.558/2.10
3.62
Cast LS-1 One Piece Seal
14088526
305
1986
2.45/2.10
3.48
Nodular Iron One piece seal
14088532
350
86-88
2.45/2.10
3.48
Forged One piece seal
14088535
305/350
86 & UP
2.45/2.10
3.48
Nodular Iron One piece seal
14088552
350
86 & UP
2.45/2.10
3.48
Forged One piece seal
Big Block Crankshaft
Casting Number
CID
Years
Journals
Stroke
Comments
3520
454
2.75/2.20
4
Forged
3521
454
70-88
2.75/2.20
4
Forged LS-6
3524
454
2.75/2.20
4
Forged
6223
366/396/402/427
68-76
2.75/2.20
3.76
Forged
7115
366/396/402/427
65-76
2.75/2.20
3.76
Forged
7416
454
70-88
2.75/2.20
4
Forged
7463
454
2.75/2.20
4
Forged
336782
454
2.75/2.20
4
Cast
353039
454
70-88
2.75/2.20
4
Nodular Iron
353638
454
2.75/2.20
4
359730
454
2.75/2.20
4
3732692
348
2.75/2.20
4
3732692
348
1958
2.50/2.20
3.25
Forged
3733223
409
62-65
2.50/2.20
3.5
Forged
3733223
348
2.50/2.20
3.25
Forged
3733226
348
2.50/2.20
3.25
Forged
3733226
348
1958
2.50/2.20
3.25
Forged
3741640
348
2.50/2.20
3.25
Forged
3741640
348
59-61
2.50/2.20
3.25
Forged
3741642
348
2.50/2.20
3.25
Forged
3741642
348
59-61
2.50/2.20
3.25
Forged
3788072
409
1961
2.50/2.20
3.5
Forged
3788072
409
2.50/2.20
3.5
Forged
3795589
409
61-62
2.50/2.20
3.5
Forged
3795589
409
2.50/2.20
3.5
Forged
3804816
366/396/402/427
61-76
2.75/2.20
3.76
Nodular Iron
3815822
348
58-61
2.50/2.20
3.25
Forged
3815822
348
2.50/2.20
3.25
Forged
3824553
348
58-61
2.50/2.20
3.25
Forged
3824553
348
2.50/2.20
3.25
Forged
3829027
409
2.50/2.20
3.5
Forged
3829027
409
1963
2.50/2.20
3.5
Forged
3837466
409/427
2.50/2.20
3.65
Forged Z-11Special performance
3837466
409
1963
2.50/2.20
3.5
Forged Z-11
3838416
409
64-65
2.50/2.20
3.5
Forged
3838416
409
2.50/2.20
3.5
Forged
3856223
396/402
65-71
2.75/2.20
3.76
Nodular Iron
3863114
402
2.75/2.20
3.76
3863144
366/396/402
68-85
2.75/2.20
3.76
Forged
3874874
366/396/402/427
66-85
2.75/2.20
3.76
Forged
3879621
427
2.75/2.20
3.76
Forged
3882841
396
2.75/2.20
3.76
Forged
3882842
366/396/427
2.75/2.20
3.76
Forged
3882849
366/396/427
2.75/2.20
3.76
Forged
3887114
396
2.75/2.20
3.76
Forged Special performance
3904815
366/396/402/427
65-76
2.75/2.20
3.76
Nodular Iron
3962523
454
2.75/2.20
4
Forged
3963521
454
2.75/2.20
4
Forged Special performance
3963524
454
70-72
2.75/2.20
4
Forged
3965746
NA
NA
NA
Semi finished Forged crank
3965753
NA
NA
NA
Semi finished Forged
3967416
454
70-71
2.75/2.20
4
Forged
3967463
454
70-88
2.75/2.20
4
Forged
3975495
454
2.75/2.20
4
3975945
454
2.75/2.20
4
3993804
NA
NA
NA
Raw Forged crank
3993878
454
2.75/2.20
4
Forged
10051169
NA
NA
NA
Raw Forged
10114186
427
2.75/2.20
3.76
Forged
10114187
396
2.75/2.20
3.76
Cast
10114188
454
2.75/2.20
4
Cast One Piece Seal
14097044
454/502
2.75/2.20
4
Forged One Piece Seal
Cylinder Head ID
Use these casting numbers to identify the heads you have.
Small Block Casting numbers
Casting Number
CID
Years
Valves
Comments
10065202
350
82-86
1.94/1.50
76cc
10065203
350
82-86
1.94/1.50
76cc
10065204
350
82-86
1.94/1.50
76cc
10065205
305
82-86
1.84/1.50
58cc
10065206
350
82-86
1.94/1.50
76cc
10065207
305
82-86
1.84/1.50
58cc
10088113
350
86-92
1.94/1.50
58cc Corvette Aluminum
10120928
350
87-94
1.94/1.50
76cc
10125320
350
94-96
2.00/1.55
Gen II LT1 cast iron version,
10128374
350
92-97
2.00/1.55
Gen II LT1 53 CC angle plug aluminum
10134363
Bowtie High Port 60 CC 210 ~ 258 CC
10159550
350
87-94
1.94/1.50
76cc
10159551
305
87-94
1.84/1.50
58cc
10159552
350
87-94
1.94/1.50
76cc
10159553
305
87-94
1.84/1.50
58cc
10185040
Splayed vavle head 45 CC angle plug
10205245
350
93
2.00/1.55
Gen II LT1 angle plug aluminum reverse flow cooling 175/68cc ports
10207643
350
94-97
2.00/1.55
Gen II LT1 angle plug aluminum reverse flow cooling 175/68cc ports
10208890
265
94-96
2.00/1.55
Gen II L99 4.3 Liter V-8, cast iron, reverse flow
10215339
346
97
2.00/1.55
Gen III LS1 aluminum 68cc
10239906
305/350
96-up
1.94/1.50
68cc Vortec
12367713
2.00/1.55
GM Fast burn 62 CC 210 CC intake runner angle plug Vortec
12480005
346
0
2.125/1.625
Gen III LS1 "GTZ" aluminum 38cc angle plug
12480011
SB2.2 head 48 ~ 54 CC angle plug 284 CC intake runner Bare heads.
12480034
2.02/1.60
Bowtie Phase III 64cc Angle plug 184 cc intake runner
12506450
350
87-94
1.94/1.50
76cc
12509859
305
87-94
1.84/1.50
58cc
12516852
350
87-94
1.94/1.50
76cc
12551561
350
96
2.00/1.55
Gen II LT1 angle plug aluminum reverse flow cooling
12552520
305
97-99
1.84/1.5
Vortec Truck L-35
12554290
350
94-96
2.00/1.55
Gen II LT1 cast iron version
12555690
350
96
2.00/1.55
Gen II LT-4 55 CC 195 CC intake runner Angle Plug
12555690
350
96
2.00/1.55
Gen II LT-4 55 CC 195 CC intake runner Angle Plug
12556743
325
99 & UP
2.00/1.55
Gen III 5.3L aluminum truck and van
12558059
305
97
1.84/1.5
L-35 Vortec truck
12558062
350
98
1.94/1.5
L-31 Vortec truck 64cc chambers 170cc intake port
12558062
305/350
96-up
1.94/1.50
68cc Vortec
12558806
346
97-98
2.00/1.55
Gen III LS1 aluminum 68cc
12559853
346
99 & UP
2.00/1.55
Gen III LS1 aluminum 68cc
12559895
325
00 & UP
2.00/1.55
Gen III 5.3L aluminum
12564241
346
00 & UP
2.00/1.55
Gen III LS1 aluminum 68cc
12564243
346
2
2.00/1.55
Gen III LS6 aluminum 68cc
12564243
346
2.00/1.55
Gen III LS-6 vette head 65 CC
14008856
267
79-81
1.71/1.50
14010201
305
82-85
1.84/1.50
58cc
14011034
350
80-up
2.02/1.60
64cc Bowtie
14011049
350
82-up
2.02/1.60
64cc Bowtie Aluminum
14014415
267/305
80-85
1.71/1.50
64cc Crack prone
14014416
267/305/350
80-86
1.84/1.50
64cc Crack prone
14019821
350
80-86
1.84/1.50
76cc
14019924
267
79-81
1.71/1.50
14019926
305
80-86
1.84/1.50
14020516
305/350
80-86
1.84/1.50
14020517
350
80-86
1.84/1.50
76cc
14020555
305
81
14020556
350
81
14022206
350
80
1.94/1.50
76cc
14022301
305
80-86
1.84/1.50
58cc
14022601
267/305
79-86
1.72/1.50 1.84/1.50
58cc
14022801
305
80-86
1.72/1.50
58cc
14034806
267
78-82
1.72/1.50
14034807
305
78-82
1.72/1.50
14034808
350
80-86
1.84/1.50
76cc
14034810
350
80-86
14034811
350
80-86
14039121
305
81-86
14039122
305
81-86
14071114
350
80-86
14075381
350
80-86
14079261
350
82-85
14085844
350
80-86
14089119
350
80-86
14096217
350
90-up
1.94/1.50
64cc Crate heads
14101081
305
87-94
1.84/1.50
58cc
14101083
350
88-94
1.94/1.50
64 cc
14102187
305
87-95
1.84/1.50
58cc
14102191
305/350
87-95
1.84/1.50
14102193
305/350
87-95
1.84/1.50
24502559
96-97
Bowtie SB2 1st design"mirror ports" aluminum
25534351C
2.00/1.55
Vortec Bowtie 65 CC 175 cc intake runner
25534371C
2.00/1.55
Vortec Bowtie 65 CC 206 cc intake runner
3238882
350
68-69
1.94/1.50
76cc
3297185
307/327/350
57-67
1.72/1.50
330545
350/400
71-75
2.02/1.60
76cc
330862
400
71-73
1.94/1.50
333881
350
71-76
2.02/1.60
76cc
333882
350/400
70-80
1.94/1.50
76cc
340292
350
73-80
2.02/1.60
64cc Angle plugs turbo' head No heat riser
354434
262/305
75-80
1.72/1.50
60cc
358741
262/305
71--79
1.72/1.50
359944
350
71-79
1.94/1.50
76cc
3636839
265
55
1.72/1.50
3703523
265
55
1.72/1.50
195HP
3713358
265
55-56
1.72/1.50
3713569
265
55-56
1.72/1.50
3725306
265
56
1.72/1.50
210HP Corvette
3731262
265
56
1.72/1.50
Dual Quad Corvette
3731539
283
57-66
1.72/1.50
283HP Corvette
3731544
265/283
55-61
1.72/1.50
Dual Quad Corvette
3731554
265/283
55-63
1.72/1.50
3731556
283
57
1.72/1.50
3731762
265
56
1.72/1.50
Dual Quad Corvette
3737775
283/327
62-67
1.72/1.50
3740997
283
57
1.72/1.50
Dual Quad FI & 4-brl 220-270HP
3743056
283
58
1.72/1.50
3743096
327
62-67
1.72/1.50
3747363
265
57-62
1.72/1.50
3748056
327
62-67
1.72/1.50
3748720
283
57-58
1.72/1.50
Dual Quad FI & 4-brl Corvette
3748770
283
55-62
1.72/1.50
Dual Quad FI & 4-brl Corvette
3748772
283
57-62
1.72/1.50
Dual Quad FI & 4-brl Corvette
3755537
283
57-62
1.72/1.50
3755538
283
59
1.72/1.50
250-290HP FI Corvette
3755539
283
58-62
1.72/1.50
3755549
283
57-62
1.72/1.50
3755550
283
57-62
1.72/1.50
Dual Quad FI & 4-brl Corvette
3755585
327
62-67
1.72/1.50
3755896
283
62-64
1.72/1.50
3760116
283
59
1.72/1.50
Dual Quad FI & 4-brl Corvette
376445
350
80-84
1.72/1.50
376450
262/305
75-76
1.72/1.50
376495
350
Jun-79
1.94/1.50
76cc
3767460
265/283/327
55-67
1.72/1.50
Car & Truck Corvette
3767462
327
62-67
1.72/1.50
3767465
283
60-61
1.72/1.50
Dual Quad FI & 4-brl Corvette
3767754
283
60-61
1.72/1.50
3767792
283
60-67
1.72/1.50
3770126
327/350
67-70
1.94/1.50
3773012
265
55
1.72/1.50
3774634
327
64-67
1.72/1.50
3774682
283/327
60-67
1.72/1.50
3774684
283/327
57-67
1.72/1.50
3774690
283
58
1.72/1.50
FI Corvette
3774692
283
58-64
1.72/1.50
Dual Quad FI & 4-brl Corvette
3782461
302/327/350
61-70
1.94/1.50
Dual Quad FI & 4-brl Corvette 2.02/1.60 Doubble humps 64cc
3782462
327
67
1.94/1.50
Corvette 2.02/1.60
3792563
327
65-67
3795896
283/307/327
58-72
1.72/1.50
60cc
3796896
283
64-67
1.72/1.50
60cc Chevy II
3798996
327
63-67
3814462
350
67
1.94/1.50
3814480
283/327
60-67
1.72/1.50
3814482
327
62-67
1.72/1.50
3817680
283
59
1.72/1.50
FI 4-brl
3817681
327
62-67
1.72/1.50
3817682
283
61-62
1.72/1.50
3836839
265
55
1.72/1.50
3836842
283/327
57-67
1.72/1.50
3836924
283
63-64
1.72/1.50
3836942
283
58-62
1.72/1.50
3837063
283
58-62
1.72/1.50
3837064
265/283
56-62
1.72/1.50
3837065
265
55-56
1.72/1.50
3837775
283/327
62-67
1.72/1.50
383882
400
71-73
3848720
283
57-58
1.72/1.50
3849820
327
65
1.72/1.50
3854520
283/327
62-67
1.72/1.50
3867802
283
57-60
1.72/1.50
FI Corvette
3873064
265
56-57
1.72/1.50
3876487
350
71-73
1.94/1.50
76cc
3876775
283/327
57-67
1.72/1.50
76cc
3878775
327
64-67
1.72/1.50
3884520
283/327
60-67
1.72/1.50
60cc
3890462
302/327/350
62-68
1.94/1.50 2.02/1.60
64cc Doubble humps
3891462
302/327/350
62-67
1.94/1.50 2.02/1.60
64cc
3891492
327
64-67
1.94/1.50
3911011
327
68
3911032
307/327
68-70
1.72/1.50
70cc
3912264
283
58-62
1.72/1.50
3912265
283
63-64
1.72/1.50
3912291
302/327/350
68-70
1.94/1.50 2.02/1.60
64ccDoubble humps
3912311
350
67
1.94/1.50
3912313
327
65-73
1.72/1.50
3917264
302
67
2.02/1.60
64cc Z-28
3917290
327
68-70
1.72/1.50
3917291
302/327/350
62-69
1.94/1.50 2.02/1.60
64cc Doubble humps
3917292
327
67-68
1.94/1.50
3917293
307/327
68-69
1.72/1.50
76cc
3921175
327
66
1.94/1.50
3923441
350
67-76
1.94/1.50
76cc
3927185
307/327/350
68-79
1.72/1.50
70cc
3927186
302/327/350
68-72
1.94/1.50 2.02/1.60
64cc Doubble humps Bolt holes
3927187
302/350
69-70
2.02/1.60
64cc Corvette
3927188
307/327/350
69
1.72/1.50
76cc
3928454
307
68
1.72/1.50
3928455
302/327
68
2.02/1.60
64cc 325 & 350HP
3928494
327
68
2.02/1.60
64cc 350HP 4-brl
3928495
327
68
1.72/1.50
3931633
307
68-73
1.72/1.50
3931635
350
68-76
1.94/1.50
76cc
3931637
327
68-69
3931638
327
68
1.72/1.50
3931639
302
68
2.02/1.60
64cc
3932441
327/350
67-79
1.94/1.50
76cc
3932454
307/350
68-799
1.72/1.50
76cc
3933148
350
68-73
76cc
3941174
327
68
1.72/1.50
3946812
350
69
1.72/1.50
3946813
350
69-79
76cc
3947014
350
68-70
3947040
302/327/350
68-70
1.94/1.50 2.02/1.60
64cc
3947041
302/327/350
68-79
1.94/1.50 2.02/1.60
64cc
3951598
400
70-71
1.94/1.50
76cc
3961598
400
70-76
1.94/1.50
76cc
3964286
350
68-77
1.94/1.50
76cc
3970126
327/350
67-79
1.72/1.50
3973195
400
71-73
1.94/1.50
76cc
3973414
327/350
64-70
2.02/1.60
64cc Z-28 LT-1 corvette
3973487
350
68-79
1.94/1.50 2.02/1.60
76cc
3973487X
350
68-73
1.94/1.50 2.02/1.60
76cc X cast 10cc's
3973493
400
70-76
1.94/1.50
76cc
3986316
350
71-72
2.02/1.60
76cc
3986330
350
69-79
1.94/1.50
76cc
3986339
307/350
68-79
1.72/1.50
76cc
3986388
350
68-79
1.72/1.50
76cc
3990941
307/350
68-82
3991492
327/350
68-73
1.94/1.50 2.02/1.60
64cc Angle plug
399380
400
70-73
76cc
3997417
307
71
1.72/1.50
3998916
350/400
72-75
2.02/1.60
76cc
3998920
350
72-75
1.94/1.50
76cc
3998991
307/350
68-79
1.72/1.50
76cc
3998993
307/350
68-79
1.71/1.50 1.94/1.50
76cc
3998997
350/400
71-73
1.94/1.50
76cc
426424
305/350/400
72-82
1.72/1.50
458624
350
69-84
1.94/1.50
76cc
460703
350
78-80
1.94/1.50
76cc
462614
305/350
77-79
1.72/1.50
462624
350
76-87
1.94/1.50 2.02/1.60
76cc Crack prone
464033
350
76-86
1.94/1.50
76cc
464036
350
76-86
1.94/1.50
76cc
468642
350/400
75-84
1.72/1.50
471513
267
79-81
1.72/1.50
472424
305
76-79
1.72/1.50
474213
305
78-82
1.72/1.50
474214
350
78-82
1.94/1.50
76cc
475590
400
78-82
1.94/1.50
76cc
517513
267
79-81
1.72/1.50
6259515
350
73
6260855
350
73-75
1.94/1.50
76cc
6260856
350
73-76
1.94/1.50
76cc
6272070
350
73
10045427
Pontiac/Chevy Aluminum, 91cc chamber Large Rectangle Port
10049875
Pontiac/Chevy Aluminum Small Rectangle port
10051128
454
90-94
2.19/1.88
72cc Bowtie Aluminum Rectangular port 400cc intake
10052902
427
Oval Port Open chamber
10101136
454
91-94
2.06/1.77
Open chamber Oval port
10101140
366/427
91-01
Oval Port Closed chamber
10114156
454
91-01
Oval Port Open chamber
10121033
454
78-88
2.06/1.77
Open chamber Oval port
10141279
454
96-01
Vortec 7400 100cc chambers Oval Port
10487052
366
77-90
Oval Port Open chamber
12352783
454
79-93
2.06/1.77
Open chamber Oval port
12363391
Oval Port Bowtie Aluminum Signature Series
12363401
Rectangle Port Bowtie Aluminum Signature Series
12558162
496
01 & UP
Gen.VII Vortec 8100 8.1L truck
12560241
454
98-01
Vortec 7400 100cc chambers Oval Port
12562932
454/502
91-95
Oval Port truck crate motor 118cc chambers
12562934
502
00 & UP
GenVI Marine
14011077
454
89-94
2.19/1.88
118cc Replacement Aluminum Rectangular port 295cc intake
14025175
454
83-93
2.06/1.77
Open chamber Oval port
14044861
454
89-94
2.19/1.88
106cc Bowtie Aluminum Rectangular port 380cc intake
14081044
454
86-90
2.06/1.77
Open chamber Oval port
14081045
454
78-87
Oval Port Open chamber
14081052
366/427/454
85-87
Oval Port Open chamber
14092359
427
86-89
2.06/1.77
Open chamber Oval port
14092360
454
85-89
2.06/1.77
Open chamber Oval port
14096188
454
87-94
2.19/1.88
118cc Replacement Rectangular port 325cc intake
14097088
502
89-date
2.19/1.88
118cc Replacement Rectangular port 325cc intake GEN V
14101398
454
86-90
2.06/1.77
Open chamber Oval port
24502585
Olds/Chevy DRCE 2 Pro Stock aluminum
330864
366/427/454
70-81
2.06/1.77
Open chamber Oval port
330865
366/427/454
70-84
2.06/1.77
Open chamber Oval port
330866
366/427
68-78
Oval Port Open chamber
330867
427
68-73
Oval Port Open chamber
336768
427
73-76
Oval Port Open chamber
336781
454
73-85
2.06/1.77
113cc Oval port
343771
366/427/454
68-85
2.06/1.77
Open chamber Oval port
343772
366/427/454
76-84
2.06/1.77
Open chamber Oval port
343783
454
75-78
2.06/1.77
Open chamber Oval port
346236
454
75-87
2.06/1.77
113cc Oval port
346238
454
75-87
2.06/1.77
113cc Oval port
352625
454
70-76
Oval Port Open chamber
353049
454
70-73
2.06/1.77
113cc Oval port
366765
427/454
73-84
2.06/1.77
Open chamber Oval port
3732791
348
58
3758379
348
59-61
3759256
348
58
3767738
348
59-61
3781147
348
60-61
High Perf
3795586
409
61
360HP
3814690
409
62-64
High Perf
3819333
348/409
62-65
3830817
409
63-65
340HP
3837731
409
63
High Perf Z-11
3852583
409
65
400HP
3856206
396
65-66
2.06/1.77
98cc Oval port
3856208
396
65
2.06/1.77
109cc Z-16/L-37 Rectangular port
3856213
366
66-70
2.06/1.77
Closed chamber Oval port
3856260
396
68
Oval Port Closed chamber
3872702
396/427
66
2.06/1.77
98cc Oval port L-34/L-35/L-36
3873858
396/427
66-67
2.06/1.77
109cc L-78/L-72 Rectangular port
3876875
427
66-70
2.06/1.77
Closed chamber Oval port
3904390
396/427
66-67
2.06/1.77
98cc Oval port L-34/L-35/L-36
3904391
396/427
65-67
2.06/1.77
107cc L-78/L-71/L-72 Rectangular port
3904392
427
67
2.19/1.88
106cc L-88/L-89 Aluminum Rectangular port
3904393
366
66-68
2.06/1.77
Closed chamber Oval port
3908952
427
67
Oval Port Open chamber
3909802
396/427
66-67
2.06/1.77
100cc Oval port L-34/L-35/L-36/L-68
3917215
396/427
67-69
2.06/1.77
100cc Oval port L-34/L-35
3917219
366/427
66-70
2.06/1.77
Closed chamber Oval port
3919840
396/427
67-69
2.06/1.77
107cc L-78/L-71/L-72 Rectangular port
3919842
396/427
68-69
2.19/1.88
106cc L-88/L-89 Aluminum Rectangular port
3931063
396/427
69-70
2.06/1.77
100cc Oval port L-34/L-35
3933148
366/396/427
69
2.06/1.77
122cc Oval port
3933149
427
69-70
2.06/1.77
122cc Oval port
3935401
427
68-76
Oval Port Open chamber
3946074
396/454
69-71
2.19/1.88
118cc L-88/ZL-1 Aluminum Rectangular port
3964280
427/454
66-70
2.06/1.77
Closed chamber Oval port
3964290
396/402/427/454
69-70
2.06/1.77
100cc Oval port
3964291
396/402/427/454
69-70
2.19/1.88
108cc L-78/L-71/L-72/LS-6 Rectangular port 325cc intake
3964292
454
70
2.19/1.88
109cc LS-6 Rectangular port
3965198
396
69
2.06/1.77
Open chamber Oval port
3975950
366/427
68-70
2.06/1.77
Closed chamber Oval port
3986133
366/427
70-85
2.06/1.77
Closed chamber Oval port
3986136
366/427
70-84
2.06/1.77
Closed chamber Oval port
3993820
402/454
71
2.06/1.77
113cc Oval port
3994025
454
71
2.19/1.88
118cc LS-6 Rectangular port
3994026
454
71
2.19/1.88
118cc LS-6 Rectangular port
3999241
402/454
72
2.06/1.77
113cc Oval port
473328
366
68-85
2.06/1.77
Open chamber Oval port
6258723
454
71
2.19/1.88
118cc LS-6 Rectangular port
6272292
402/454
71
2.06/1.77
Open chamber Oval port
6272990
454
71-94
2.19/1.88
118cc Replacement Rectangular port 325cc intake
Use these casting numbers to identify the exhaust manifolds you have.
Casting Number
Years
Engine
Side
Comments
336706
74-78
350
RH
336707
74-78
350
LH
336708
74-78
350
RH
336709
74-78
350
RH
Camaro & Z-28 with A.I.R.
336710
74-78
307, 350 & 400
LH
Chevelle, Camaro, Z-28, Nova and Passenger with A.I.R.
346222
74-80
307, 350 & 400
RH
Chevelle, Camaro, Nova and Passenger with A.I.R.
346247
75-77
262, 350 & 400
LH
Chevelle, Camaro, Monte Carlo and Passenger 110, 145, 155 & 175 HP
346248
75-77
262, 350 & 400
RH
Chevelle, Camaro, Monte Carlo and Passenger 110, 145, 155 & 175 HP
354432
75-76
262
RH
110 HP
354433
75-76
262
LH
110 HP
364753
76-80
307, 350 & 400
LH
Camaro, Monte Carlo, Malibu and Passenger
372243
74-83
307, 350 & 400
RH
Corvette and Replacement manifold
462697
77-79
267 & 305
LH
Monte Carlo and Malibu
462698
77-83
267 & 305
RH
Monte Carlo and Malibu
474008
78-82
267, 305 & 350
RH
745994
80-86
267 & 305
LH
3704791
55-56
265
LH
Corvette and Passenger 195 HP
3704792
55-56
265
RH
Corvette and Passenger 195 HP
3725563
56
265
LH & RH
Corvette and Passenger 210 HP 2-Bolt Flange
3731557
56
265
LH
Corvette and Passenger 225 HP
3731558
56
265
RH
Corvette and Passenger 225 HP
3732498
58
283
RH
Corvette FI
3733975
57
283
LH
Corvette and Passenger 220, 245, 250, 270 & 283 HP
3733976
57
283
RH
Corvette and Passenger 220, 245, 250, 270 & 283 HP
3737902
62-65
327
RH
300, 340, 360, 365 & 375 HP 2.5" Outlet
3746563
65
327
LH
300 HP
3747038
58-65
283 & 327
RH
Corvette and Passenger 220, 250 & 300 HP 1.9" Outlet
3747042
58-68
283, 307 & 327
RH
Corvette and Passenger 195, 200, 220, 250, 270, 275, 290, 300 & 350 HP 1.9" Outlet
3747938
64
327
LH & RH
250 & 300 HP
3747942
65
327
LH & RH
250, 350 & 365 HP
3749965
58-63
283 & 327
LH
Corvette and Passenger 230, 245, 250, 270, 275, 290, 300 & 315 HP
3750556
58-65
283 & 327
RH
Corvette and Passenger 230, 245, 250, 270, 275, 290, 300 & 315 HP
3780728
64-67
327
LH
Chevy II
3790729
64-67
283 & 327
LH
195, 220, 250, 270, 275, 300 & 350 HP 2.0" Outlet Chevy II
3790730
64-65
283 & 327
RH
220, 250 & 300 HP 1.9" Outlet Chevy II
3791162
65-66
283 & 327
RH
Chevy II with AC
3791182
66-67
283 & 327
RH
Passenger with AC
3797901
62-63
327
LH
Corvette 300, 340 & 360 HP
3797902
62-65
327
RH
Corvette 300, 340, 360, 365 & 375 HP 2.5" Outlet
3797942
63-65
327
LH & RH
Corvette 300, 360, 365 & 375 HP 2.5" Outlet
3834947
64-68
283, 307 & 327
LH
Chevelle 195, 200, 210, 220, 250, 275, 295, 300, 325, 350 & 365 HP 2.0" Outlet
3836968
55-56
265
RH
Corvette and Passenger 195 HP
3837069
55
265
LH
Corvette and Passenger 195 HP
3840715
64
283 & 327
LH
Chevelle
3840912
64-68
283, 307, 327 & 350
RH
Chevelle, Camaro and Nova 195, 200, 210, 220, 250, 275, 295, 300, 325, 350 & 365 HP 1.9" Outlet
3846559
64-71
327 & 350
LH
Corvette 250, 270, 300 & 350 HP 2.0" Outlet
3846563
64-65
327
LH
Corvette 300, 350 & 365 HP 2.5" Outlet
3846659
66
327
LH
350 HP
3849288
64-67
283 & 327
RH
195, 220, 275 & 350 HP 1.9" Outlet Chevy II
3849290
64-67
283 & 327
RH
195, 220, 275 & 350 HP 1.9" Outlet Chevy II with AC
3855163
65-68
283, 307 & 327
LH
Passenger and Truck 195, 200, 220, 250 & 275 HP 2.0" Outlet
3872723
66-67
283 & 327
LH
195, 220, 275 & 350 HP 2.0" Outlet Chevy II A.I.R.
3872729
66
283 & 327
LH
Chevelle 195,220, 275 & 350 HP 2.0" Outlet A.I.R.
3872730
66-68
283, 302, 307 & 327
RH
Chevelle, Camaro & Z-28 200, 210, 220, 250, 275, 290, 325 & 350 HP 1.9" Outlet A.I.R.
3872738
66-67
283 & 327
RH
195, 220, 275 & 350 HP 1.9" Outlet Chevy II
3872741
66-68
283, 307 & 327
LH
Passenger 195, 200, 220, 250 & 275 HP 2.0" Outlet A.I.R.
3872765
67-71
327 & 350
LH
Corvette 300, 330, 350 & 370 HP 2.0" Outlet A.I.R.
3872778
66-68
283, 307 & 327
RH
Corvette, Passenger and Truck 195, 200, 250, 275, 300 & 350 HP 1.9" Outlet A.I.R.
3887186
66
283
RH
220 HP 1.9" Outlet
3890424
64-67
283 & 327
RH
Chevy II
3892679
66-68
283, 302, 307, 327 & 350
LH
Chevelle, Camaro and Z-28 195, 200, 210, 220, 250, 275, 290, 295 & 325 HP 2.0" Outlet
3892683
66-68
283, 302, 307, 327 & 350
LH
Chevelle, Camaro and Z-28 195, 200, 210, 220, 250, 275, 290, 295 & 325 HP 2.0" Outlet
3893604
66-68
283 & 327
RH
Passenger A.I.R.
3893608
67-68
283, 302, 307, 327 & 350
RH
Chevelle, Camaro and Z-28 195, 200, 210, 250, 275, 290, 295 & 325 HP 1.9" Outlet
3896956
67-68
283 & 327
RH
Truck
3905364
69-72
307, 350 & 400
RH
Truck
3932376
69-70
307, 327, 350 & 400
RH
Chevelle and Camaro 200, 210, 250, 255, 265 & 300 HP 1.9" Outlet
3932461
69-74
327 & 350
LH & RH
Corvette 190, 195, 200, 235, 255, 300, 330 & 350 HP 1.9" Outlet A.I.R.
3932465
69-70
327, 350 & 400
RH
Passenger 235, 250, 255, 265, 300 & 350 HP 1.9" Outlet
3932469
69-70
327 & 350
LH
Passenger 235, 250, 255 & 300 HP 2.0" Outlet
3932473
69-70
327, 350 & 400
LH
Passenger 235, 250, 255, 265 & 300 HP 2.0" Outlet
3932481
69
350
RH
Corvette
3940972
67
350
RH
Camaro 295 HP
3942527
69-70
302, 307, 327 & 350
LH
Chevelle, Camaro, Z-28 and Nova 200, 210, 250, 255, 290, 300 & 360 HP 2.0" Outlet A.I.R.
3942529
69-70
302, 307, 327, 350 & 400
LH
Chevelle, Camaro and Nova 200, 210, 250, 255, 290 & 300 HP 2.0" Outlet
3946826
69-70
302, 307, 327 & 350
RH
Chevelle, Camaro, Z-28 and Nova200, 210, 250, 255, 290, 300 & 360 HP 1.9" Outlet A.I.R.
3959562
72-74
307, 350 & 400
RH
Chevelle, Camaro and Z-28 115, 130, 145, 150, 160, 165, 170, 175, 180, 185 & 245 HP 2.0" Outlet A.I.R.
3973432
70-74
307, 350 & 400
RH
Chevelle, Camaro, Nova and Passenger 115, 130, 150, 165, 170, 175, 180, 200, 245, 250, 255, 270 & 300 HP 2.0" Outlet
3986330
69-73
302, 307, 327 & 350
RH
Camaro and Z-28 200, 210, 245, 250, 255, 290, 300, 330 & 360 HP 1.9" Outlet A.I.R.
3989036
71-75
350
LH & RH
Corvette and Passenger 165, 195, 200, 205 & 270 HP 2.0" Outlet with and without A.I.R.
3989041
69-74
302, 307, 327, 350 & 400
LH
Camaro, Z-28 and Nova 115, 130, 145, 150, 160, 165, 170, 180, 185, 200, 210, 245, 250, 255, 290, 300, 330 & 360 HP 2.0" Outlet with and without A.I.R.
3989043
70-73
307, 350 & 400
LH
Chevelle, Camaro, Nova and Passenger 105, 115, 130, 145, 150, 165, 175, 185, 200, 245, 250, 255, 270 & 300 HP 2.0" Outlet with and without A.I.R.
3989055
69-72
307, 350 & 400
LH
3997742
71-78
307 & 350
RH
2.0" Outlet
3998902
72-78
307 & 350
RH
10045315
88-94
305 & 350
LH
10045317
88-94
305 & 350
LH
10045317
88-94
305 & 350
LH
10046123
87-92
305 & 350
LH
10046139
84-85
350
LH
10046140
84-85
350
RH
10055734
87-91
350
RH
10092901
89-91
350
LH
10092903
89-94
350
LH
10092905
89-94
350
LH
10108437
87-93
305 & 350
RH
10128448
91-93
305 & 350
LH
10128483
91-93
305 & 350
LH
10166144
91-94
350
RH
10166145
87-90
305 & 350
LH
10166147
89-94
305 & 350
LH
10166158
89-94
305 & 350
RH
10168494
94
265 & 350
LH
10207656
93-94
350
LH
10207657
93
350
RH
10433037
82-86
305
LH
12550621
94
265
RH
12550622
91
350
RH
14007400
80-86
267 & 305
LH
14014437
80-84
305
LH
14014438
80-84
305
RH
14014459
81-86
305 & 350
LH
14014500
79-86
267, 305 & 350
RH
14022625
80-81
305
LH
14031361
82-86
305
RH
14031376
81-86
350
RH
14034069
81-86
350
RH
14034075
81-86
305 & 350
LH
14043373
82-86
305
LH
14050233
83-86
305 & 350
LH
14050282
83-87
305 & 350
RH
14050287
82-86
305
LH
14057029
84-85
350
LH
14057030
84-85
350
RH
14060630
81-86
350
RH
14060633
81-86
305 & 350
LH
14067365
77-86
267, 305, 350 & 400
LH
14068667
85-88
350
LH
14068670
85-88
350
RH
14071200
83-86
305
RH
14075611
83-86
305
LH
14079295
85-86
305 & 350
LH
14079296
85-86
305 & 350
RH
14087511
86-91
350
LH
14087512
86-91
350
RH
14093653
87-90
305 & 350
LH
14093654
87-90
305 & 350
RH
14093655
87-90
305 & 350
LH
14093658
88-94
305 & 350
RH
14093660
87-90
305 & 350
RH
14093682
87-90
305 & 350
RH
14094045
87-90
305 & 350
LH
14094063
87-92
305 & 350
LH
14094064
87-92
305 & 350
RH
14094065
85-88
350
RH
14101054
87-88
305 & 350
RH
14102016
88-94
305 & 350
RH
14102018
89-94
305 & 350
RH
14103206
87-91
305 & 350
RH
14103207
87-91
305 & 350
LH
329225
73-76
454
LH
Chevelle and Passenger with and without A.I.R.
353028
73-76
454
LH
Chevelle and Passenger with and without A.I.R.
353030
73-76
454
LH
Police
3732793
58-61
348
LH
Passenger
3732794
58-61
348
RH
Passenger
3767583
59-61
348 & 409
LH
Passenger
3767584
59-61
348 & 409
RH
Passenger
3814682
62-64
409
RH
Passenger
3814683
62-64
409
LH
Passenger
3822925
62-64
409
LH
Passenger & Z-11
3822926
62-64
409
RH
Passenger & Z-11
3855161
65
409
LH
Passenger 340 & 400 HP
3855162
65
409
RH
Passenger 340 & 400 HP
3856297
65
396
LH
325 HP
3856301
65
396
LH
425 HP Corvette
3856302
65
396
RH
425 HP Corvette
3856306
65
396
RH
Passenger 325 HP
3857297
65
396
LH
Passenger 325 HP
3868874
65-66
396
RH
Chevelle 325, 360 & 375 HP Z-16
3869925
65
396
LH
Chevelle 375 HP Z-16
3872770
66
396
RH
3880827
66-69
427 & 454
LH
Corvette
3880828
66-72
427 & 454
RH
Corvette 270, 365, 390 & 425 HP with and without A.I.R. LS-5 & LS-6
3880869
70-72
454
LH
Corvette 365 & 425 HP with and without A.I.R. LS-5 & LS-6
3883827
66
427
LH
Passenger
3883828
66
427
RH
Passenger
3883999
66
396
LH
Chevelle 325, 360 & 375 HP
3884504
66-67
396 & 427
RH
Passenger 325, 385 & 390 HP
3892307
66-67
396 & 427
LH
Passenger 325 & 390 HP
3902401
67
396
LH
Chevelle
3904399
66
396
LH
3909879
67-70
396, 427 & 454
LH
Chevelle, Camaro and Nova 325, 350, 375, 425, 430 & 450 HP LS-6 COPO
3909880
67
396
RH
Chevelle and Camaro 325, 350 & 375 HP
3914613
68-70
396 & 427
LH
Passenger 265, 325, 335, 345, 390 & 425 HP
3916178
68-70
396, 427 & 454
RH
Chevelle, Camaro, Nova and Passenger 325, 350, 375, 425, 430 & 450 HP COPO LS-5 & LS-6
3969869
70-74
454
LH
Corvette 270, 365 & 390 HP with and without A.I.R. LS-5
3989310
71-72
402 & 454
RH
Chevelle, Camaro, Monte Carlo and Passenger
3989343
71-72
402 & 454
LH
Chevelle, Camaro, Monte Carlo and Passenger
3994045
73-75
454
LH
Police
Chevy Intake Manifolds
Use these numbers to identify your stock Chevy intake.
Casting Number
CID
Years
Type
Comments
10051103
350
1990
4-Brl
Aluminum Bowtie Single plane
10066013
350
87-89
TPI
Corvette Base MASS air 9th injector style Aluminum heads (86 and older)
10077151
305/350
90-92
TPI
Plenum Speed density type
10086016
305/350
90-92
TPI
Base Speed density type (87 & UP intake bolt pattern)
10108630
350
92-97
MFI
LT-1
12550631
350
96
MFI
LT-4 Power coated red
12552138
265
93-96
MFI
L-99 (lt-1 style 4.3L V-8)
14007374
305
79-82
2-Brl
Aluminum
14014432
350
1981
4-Brl
Aluminum Quadrajet Z-28
14057053
305/350
80-88
4-Brl
Aluminum Quadrajet
14081006
350
87-89
TPI
Corvette Plenum MASS air 9th injector style
14096242
350
1990
4-Brl
Holley High rise Bowtie
340261
350/400
74-76
4-Brl
Quadrajet
340266
305/350/400
73-82
2-Brl
340281
305/350
82-85
4-Brl
Quadrajet
346249
305/350/400
75-77
4-Brl
Quadrajet
346250
305/350
76-82
4-Brl
Quadrajet
346260
267/305/350
73-77
2-Brl
355943
262
1975
2-Brl
3704790
265
1955
2-Brl
3711348
265
1955
4-Brl
WCFB
3728725
265
1956
Dual Quad
Aluminum
3731394
283
56-57
Dual Quad
Aluminum
3731398
283
1957
4-Brl
WCFB
3732690
265/283
56-57
2-Brl
3732880
265/283
56-57
2-Brl
3735444
265
1956
2-Brl
3735448
265
1956
4-Brl
WCFB
373598
305
78-81
2-Brl
Aluminum
3737109
265
1956
4-Brl
WCFB
3739653
283
58-61
Dual Quad
Aluminum
3741193
283
1957
Fuel Injection
Aluminum
3746826
265/283
56-63
2-Brl
3746829
283/327
58-64
4-Brl
WCFB
3753809
283
59-62
2-Brl
3783244
327
62-63
4-Brl
WCFB
3794129
327
1963
4-Brl
Aluminum
3795397
327
1962
4-Brl
Aluminum
3799349
327
62-64
4-Brl
Carter AFB
3826810
327
63-65
Fuel Injection
Aluminum
3837109
265/283
56-57
4-Brl
WCFB
3840905
283
64-65
2-Brl
3844457
283/327
64-65
4-Brl
WCFB
3844459
327
63-65
4-Brl
Carter AFB
3844461
327
64-65
4-Brl
Aluminum
3866922
283/327
62-65
4-Brl
WCFB
3872783
283/327
66-67
4-Brl
Holley
3872788
238/327
66-67
4-Brl
Holley
3875954
327
1966
4-Brl
Carter AFB
3877652
283/327
65-67
2-Brl
3882858
283
1966
4-Brl
Carter AFB
3890490
327
66-67
4-Brl
Aluminum
3905393
327/350
1967
4-Brl
Quadrajet
3910601
327
67-68
2-Brl
3916313
307/327/350/400
69-70
2-Brl
3917610
302
67-68
4-Brl
Aluminum
3919801
307/327
1968
2-Brl
3919803
327/350
67-68
4-Brl
Quadrajet
3927183
307/327
69-70
2-Brl
3927184
350
1969
4-Brl
Quadrajet
3932472
302/350
69-70
4-Brl
Aluminum
3941126
302
68-69
Cross Ram
Aluminum base
3941130
302
68-69
Cross Ram
Aluminum top plate
3958622
307/327
69-70
2-Brl
3958626
350
69-70
2-Brl
3959594
350
71-72
4-Brl
Aluminum
3965577
350
1970
4-Brl
Quadrajet
3972110
350
1970
4-Brl
Aluminum
3972114
350
70-72
4-Brl
Aluminum
3972116
350
1970
4-Brl
Aluminum Service replacement part
3972361
350
1971
4-Brl
Aluminum
3973465
307
69-71
2-Brl
3973467
350/400
1971
2-Brl
3973469
350
1971
4-Brl
Quadrajet
3987361
350
69-70
4-Brl
Quadrajet
3990948
350
1971
2-Brl
3991004
350
1973
4-Brl
Quadrajet
3991005
307
1971
2-Brl
3997770
350
1973
4-Brl
Quadrajet
3997771
350
1973
4-Brl
Quadrajet
3997772
350
1973
2-Brl
3997773
350/400
1973
2-Brl
458520
305/350
77-82
4-Brl
Quadrajet
458520
305/350
82-87
4-Brl
Aluminum
6262928
307
1972
2-Brl
6262930
350
1972
4-Brl
Quadrajet
6262936
307
1972
2-Brl
6263751
350
1972
4-Brl
Quadrajet
6263752
350/400
1972
2-Brl
626932
350
71-72
4-Brl
Quadrajet
6271060
307
1973
2-Brl
6271061
307
1973
2-Brl
7014360
283
1957
Rochester FI
7014520
283
1957
Rochester FI
7014800
283
57-58
Rochester FI
7014800R
283
1985
Rochester FI
7014900
283
1958
Rochester FI
7014900R
283
1958-59
Rochester FI
7014960
283
1958
Rochester FI
7017200
283
59-61
Rochester FI
7017250
283
59-61
Rochester FI
7017300
283
59-60
Rochester FI
7017300R
283
1959
Rochester FI
7017310
283
60-61
Rochester FI
7017320
283
1960
Rochester FI
7017355
327
1962
Rochester FI
7017360
327
1962
Rochester FI
7017375
327
1963
Rochester FI
7017375R
327
1964
Rochester FI
7017380
327
64-65
Rochester FI
336789
454
74
Q-jet
Oval port
346242
454
75
Q-jet
Oval port
353015
454
73
Q-jet
Oval port
3732757
348
58-62
4-Brl
3749948
348
58-61
Three duce
3753748
348
60-61
Dual quad
Aluminum
3760436
348
58-59
4-Brl
3767579
348/409
61
4-Brl
3770084
348
58-59
4-Brl
3772265
348
60-61
4-Brl
3780540
348
58-59
4-Brl
Aluminum
3797775
348
59-60
4-Brl
3797776
409
61
4-Brl
3813678
409
62-63
4-Brl
3814881
409
62-64
Dual quad
Aluminum
3830623
409
63
Dual quad
Aluminum Z-11
3830831
409
63
4-Brl
340HP
3844463
409
64-65
4-Brl
400HP
3844464
409
64-65
4-Brl
340HP
3844472
348/409
62-65
4-Brl
3856289
396
65-66
Q-jet
Oval port L-35
3866948
396/427
66-67
Holley
Oval port L-34/L-35
3866963
396
65
Holley
Rectangular port Aluminum L-37
3883984
396/427
66-68
Q-jet
Oval port L-35/L-36
3885069
396/427
66-68
Holley
Rectangular port Aluminum L-78/L-72
3886093
427
67
Holley
Rectangular port Aluminum L-88
3894374
427
67
Three duce
Rectangular port Aluminum L-71
3894382
427
67
Three duce
Oval port Aluminum L-68
3919849
427
68
Q-jet
Oval port Aluminum L-36
3919850
427
68
Three duce
Oval port Aluminum L-68
3919852
427
68
Three duce
Rectangular port Aluminum L-71
3919878
396/427
68
Holley
Rectangular port Aluminum L-78/L-72
3931067
396/427
69
Q-jet
Oval port L-35/L-36
3933163
396/427
68-69
Holley
Rectangular port Aluminum L-78/L-89 COPO
3933198
427
68-69
Holley
Rectangular port Aluminum L-88/ZL-1
3937793
427
68
Q-jet
Oval port Aluminum L-36
3937795
427
69
Three duce
Oval port Aluminum L-68
3937797
427
69
Three duce
Rectangular port Aluminum L-71
393841
454
73-75
Q-jet
Oval port
3947801
427
69
Q-jet
Oval port Aluminum L-36
3952900
396
69
2-Brl
Oval port
3955287
402/454
70-71
Q-jet
Oval port LS-3/LS-5
3963569
396/402/454
70-71
Holley
Rectangular port Aluminum Low rise L-78/L-89/LS-6
3967474
454
71
Holley
Rectangular port Aluminum
6263753
402/454
72
Q-jet
Oval port LS-3/LS-5
6269318
454
72
Holley
Rectangular port Aluminum
Use these casting numbers to identify the block you have.
Small Block Casting numbers
Casting Number
Years
CID
Comments
330817
70-80
400
Car & Truck 2 & 4-bolt 3-freeze plugs
355909
75-79
262/305
car & Truck 2-bolt
360851
75-76
262
2-bolt
361979
76-79
305
car & Truck 2-bolt
366245
78-82
350
Bowtie High tin 4-bolt
366286
82
350
Bowtie aluminum 4-bolt siamesed
366287
82
350
Bowtie aluminum 4-bolt siamesed
366299
82
350
Bowtie aluminum 4-bolt
389257
67
302
2-bolt
391436
68-73
307
2-bolt
393288
65-67
283
2-bolt
460703
78
350
4-bolt
460776
76-79
305
Car & Truck 2-bolt
460777
76-79
305
Car & Truck 2-bolt
460778
76-79
305
2-bolt
471511
79-82
267
Car & Truck 2-bolt
3556519
58-61
283
2-bolt
3703524
55
265
car & Corvette no oil filter 2-Bolt
3720991
55-56
265
Car & Truck 2-bolt
3731548
57
283
Car & Truck 2-bolt No side mount
3737737
57-62
283
2-bolt
3737739
57-62
283
2-bolt
3756519
58-62
283
2-bolt
3782870
62-67
327
car & Truck 2-bolt
3789817
62-67
327
2-bolt
3789935
61-66
283
car & Truck 2-bolt
3790721
64-67
327
2-bolt Chevy II Nova Recessed filter
3791362
66-67
327
2-bolt Chevy II Nova Recessed filter
3791363
66-67
327
2-bolt Chevy II Nova Recessed filter
3792563
65
327
2-bolt
3792582
64-65
283
2-bolt
3794226
57-63
283
2-boltTruck
3794460
68-69
327
2-bolt
3814660
68-69
327
2-bolt
3830944
63
327
2-bolt
3834810
65-67
283
car & Truck 2-bolt
3834812
62-63
283
2-bolt
3837739
58-62
283
2-bolt
3849852
57-66
283
car & Truck 2-bolt
3849859
57-66
283
car & Truck 2-bolt
3849935
65-67
283
2-bolt
3858174
64-67
327
car & Truck 2-bolt
3858180
64-67
327
2-bolt
3858618
68-76
350
2 & 4-Bolt
3862194
65-67
283
2-bolt Chevy II Nova Recessed filter
3864812
62-67
283
car & Truck 2-bolt
3892657
64-67
302/327/350
car & Truck 2-bolt
3892659
68-69
327
2-bolt Large journal
3896944
67
283
2-bolt
3896948
66-67
283
2-bolt
3903352
67
327
2-bolt
3914635
68-73
307
car & Truck 2-bolt
3914636
68-73
307
car & Truck 2-bolt
3914638
68
327
2-bolt
3914653
68
307
2-bolt
3914660
68-69
327
car & Truck 2-bolt
3914678
68-79
302/327/350
car & Truck 2-bolt
3931174
68
307
2-bolt Truck
3932371
69-73
307
car & Truck 2-bolt
3932373
69-73
307
car & Truck 2-bolt
3932386
68-74
302-327-350
2 & 4-Bolt
3932388
68-79
350
car & Truck 4-Bolt
3932442
67
350
2-bolt Camaro
3933180
68-69
327
car & Truck Large journal 2-Bolt
3951509
70-80
400
car & Truck 2 & 4-Bolt 2-freeze plugs
3951511
70-80
400
car & Truck 2 & 4-Bolt 3-freeze plugs
3956618
68-79
302/327/350
2 & 4-Bolt
3956632
69-73
307
car & Truck 2-bolt
3959512
62-63
327
2-bolt
3970010
69-79
302/350
car & Truck 2 & 4-Bolt Most common
3970014
68-79
350
car & Truck 2 & 4-Bolt
3970020
69-73
307
car & Truck 2-bolt
3970024
69-73
307
car & Truck 2-bolt
3992386
68-69
327
car & Truck Large journal 2-Bolt
10036033
350
4-bolt Mexico cast Crate engine
10051182
350
Car and Truck 2 & 4-bolt 1 Piece Seal Passenger stick
10051184
86-up
350
Car & Truck 2 & 4-bolt Passenger stick 1-piece seal
10054727
86-up
350
Car & Truck 2-bolt Passenger stick 1-piece seal
10066036
86-up
350
Car & Truck 2 & 4-bolt Passenger stick 1-piece seal
10066038
350
2 & 4-Bolt Mexico cast Crate engine
10090511
90
350
4-bolt LT-5 ZR-1
10125327
93-up
350
Camaro/firebird 2 & 4-bolt LT-1 Reverse cooling Roller cam
10134996
400
4-bolt Bowtie Aluminum 400 Mains/Bore
10153558
91-92
350
4-bolt LT-5 ZR-1
10168588
94-96
265
2-bolt LT-1 Reverse cooling
10199001
93-95
350
4-bolt LT-5 ZR-1
10243878
96-up
305
2-bolt Vortec Roller
10243880
96-up
350
2 & 4-Bolt Vortec Roller
12550592
97-up
350
Crossbolted LS-1 Aluminum
12551364
98 & UP
365
Gen III 6.0L Iron Block. LQ-4 and LQ-9
12559378
97-up
350
Crossbolted LS-1 Aluminum
12559846
97-up
350
Crossbolted LS-1 Aluminum
12560621
97-up
350
Crossbolted LS-1 Aluminum
12560629
97-up
350
Crossbolted LS-1 Aluminum
12561168
97-up
350
Crossbolted LS-1 Aluminum
12561358
99 & UP
293/325
Gen III 4.8L and 5.3L Iron Block.
12562174
97-up
350
Crossbolted LS-1 Aluminum
12573581
98 & UP
365
Gen III 6.0L Iron Block. LQ-4 and LQ-9
12577184
98 & UP
365
Gen III 6.0L Iron Block. LQ-4 and LQ-9
14010201
80-85
305
car & Truck 2-bolt Passenger stick
14010202
80-85
305
car & Truck 2-bolt Passenger stick
14010203
80-85
305
car & Truck 2-bolt Passenger stick
14010205
80-82
267
car & Truck 2-bolt Passenger stick
14010207
80-85
350
car & Truck 2 & 4-Bolt Passenger stick
14010209
80-85
350
car & Truck 2 & 4-Bolt Passenger stick
14010280
80-82
267
car & Truck 2-bolt Passenger stick
14010287
80-82
350
2-bolt Passenger stick
14011064
80-85
350
4-bolt Passenger stick
14011148
87-89
350
2 & 4-Bolt Roller cam one piece seal
14016376
80-82
267
2-bolt Passenger stick
14016379
77-79
350
2 & 4-Bolt
14016379
77-79
267
2-bolt dipstick in pan
14016381
76-85
305
car & Truck 2-bolt Passenger stick After 79
14016382
80-85
305
2-bolt Passenger stick
14016383
80-85
305
2-bolt Truck
14079287
86-90
350
2-bolt Passenger stick one piece seal
14088526
87-89
350
2-bolt Roller cam Passenger stick 1-piece seal
14088548
86-88
350
2-bolt Truck Passenger stick 1-piece seal
14088551
86-88
305
Car & Truck 2-bolt Passenger stick 1-piece seal
14093627
87-88
305
Car & Truck 2-bolt Passenger stick 1-piece seal
14093638
87-95
350
Car & Truck 2 & 4-bolt Passenger stick 1-piece seal
14094766
86-up
305
2-bolt Passenger stick one piece seal
14101147
86-up
305
2-bolt Passenger stick one piece seal
14101148
86-up
350
2 & 4-Bolt Passenger stick 1-Piece seal Roller cam
14102058
86-88
305
Car & Truck 2-bolt Passenger stick 1-piece seal
14316379
68-88
350
Car & Truck 2-bolt Passenger stick 1-piece seal
Big Block Casting numbers
Casting Number
Years
CID
Comments
340220
72-76
427
Truck Tall deck
345014
74-86
454
Truck
346236
74-76
454
2-bolt
359070
74-90
454
Truck
361959
73-85
454
Car & Truck
364776
68-84
427
Truck Tall deck
364779
68-88
366
Truck Tall deck
399204
70-71
509
4-Bolt Aluminum Can-AM
399289
73-79
454
2-bolt
399293
77-78
366
Truck
473478
68-84
427
Truck Tall deck
3716362
396
3732755
59-61
348
3732811
58
348
3751872
58
348
3755011
59-61
348
3771705
59-61
348
3782012
58-61
348
3782870
68-76
427
Truck Tall deck
3788068
62
409
3795623
61
409
3798962
62-65
348
Truck
3815707
58-61
348
3824553
66-67
366
Truck
3830814
63
409
3839752
62-63
409
3839754
65
409
3844422
64
409
3855961
66-67
396
2-bolt
3855962
65-66
396
4-Bolt
3855977
65-67
366
Truck Tall deck
3857651
409
Marine
3857655
62-65
348
Truck
3857656
65
409
3857658
409
Marine
3860386
62-64
409
3860387
58
348
3869942
66-67
427
2 & 4-Bolt
3873858
66
396
4-Bolt
3902406
67
396
2 & 4-Bolt
3902466
65-67
396
3904351
67
427
2 & 4-Bolt
3904354
66-67
366
Truck Tall deck
3916319
68-85
366
Truck Tall deck
3916321
68
427
2 & 4-Bolt
3916323
68
396
2 & 4-Bolt
3918319
66-70
366
Truck
3925521
68-85
366
Truck Tall deck
3935439
68-69
427
2 & 4-Bolt
3935440
68-69
396
2 & 4-Bolt
3937724
68-85
366
Truck Tall deck
3937726
68-84
427
Truck Tall deck
3946052
69
427
ZL-I Aluminum 4-Bolt
3946053
97
427
ZL-I Aluminum 4-Bolt 2nd design
3955270
69
427
2 & 4-Bolt
3955272
69
396/402
2 & 4-Bolt
3955274
68-85
366
Truck Tall deck
3955276
68-84
427
Truck Tall deck
3963512
69-71
427/454
2 & 4-Bolt COPO
3963513
73-76
454
3965440
68-69
396
3965449
68-72
396
3969852
68-84
366
Truck
3969854
69-72
396/402/454
2 & 4-Bolt
3969858
68-84
427
Truck Tall deck
3995623
61
409
3999289
72-78
454
Car & Truck 2-Bolt
3999290
72
402
2-bolt
3999293
68-85
366
Truck Tall deck
3999294
68-84
427
Truck Tall deck
6272176
68-76
366
Truck
6272177
72
402
2-bolt
6272181
73-76
427
Truck
10051107
454
4-Bolt Bowtie IV Short deck
10068286
90-91
454
4-Bolt IV Short deck
10069284
427
Truck
10114182
91-95
454
4-Bolt Gen-5
10114183
91-95
366
Truck Gen-5
10114184
91-95
427
Truck Gen-5
10134366
454
4-Bolt Gen-5 Bowtie Tall deck
10185050
454
4-Bolt Gen-5 Bowtie Short deck
10237297
96-up
454
4-Bolt Vortec 7400 Gen-6
10237300
96-up
502
4-Bolt 4.466 bore Gen-6
12550313
91-95
454
4-Bolt Gen-5
12556110
01-up
496
4-Bolt Vortec 8100 Gen-7
14015445
75-90
454
Car & Truck
14015543
87-90
454
4-Bolt Gen-5
14044807
454
4-Bolt IV Bowtie Tall deck
14096859
502
4-Bolt Gen-5
24502504
454
4-Bolt Gen-5 Bowtie Short deck
24502572
4-Bolt DRCE-2 Olds "9.5"" deck"
Crankshaft Identification
Use these casting numbers to identify the crankshaft you have.
Small Block Casting numbers
Casting Number
CID
Years
Journals
Stroke
Comments
1130
307/327
68-73
2.45/2.10
3.25
Nodular Iron
1178
302
2.45/2.10
3
Forged
1181
305/350
68-76
2.45/2.10
3.48
Nodular Iron
1182
350
2.45/2.10
3.48
Forged
2680
327
2.30/2.00
3.25
Forged
2690
350
2.45/2.10
3.48
Forged
3279
302
68-69
2.45/2.10
3
Forged
4577
327
62-67
2.3/2.0
3.25
Nodular Iron
4672
307/327
68-73
2.45/2.10
3.25
Nodular Iron
310514
350
77-85
2.45/2.10
3.48
Nodular Iron
330550
350
73-75
2.45/2.10
3.48
Forged
354431
262
75-76
2.45/2.10
3.1
Nodular Iron
3727449
283
57-67
2.3/2.0
3
Forged
3729449
265
55-57
2.3/2.0
3
Forged
3734627
327
62-67
2.3/2.0
3
Forged
3735236
265/283
55-67
2.3/2.0
3
Forged
3735263
283
57-63
2.3/2.0
3
Forged
3782680
327
62-67
2.3/2.0
3.25
Forged
3814671
327
2.30/2.00
3.25
Forged
3815822
265/283
55-67
2.3/2.0
3
Forged
3835236
283
57-65
2.3/2.0
3
Forged
3836266
265/283
56-63
2.3/2.0
3
Forged
3849847
283
57-67
2.3/2.0
3
Forged
3876764
283
64-67
2.3/2.0
3
Nodular Iron
3876768
283
64-67
2.3/2.0
3
Nodular Iron
3884577
327
2.30/2.00
3.25
Forged
3892690
350
68-85
2.45/2.10
3.48
Forged
3911001
307/327
68-73
2.45/2.10
3.25
Nodular Iron
3911011
307/327
68-73
2.45/2.10
3.25
Nodular Iron
3914672
327
2.45/2.10
3.25
Forged
3923279
302
2.45/2.10
3
Forged
3932442
305/350
69-85
2.45/2.10
3.48
Nodular Iron
3941174
307/327
68-73
2.45/2.10
3.25
Nodular Iron
3941178
302
68-69
2.45/2.10
3
Forged
3941182
350
68-76
2.45/2.10
3.48
Forged
3941188
350
2.45/2.10
3.48
Forged
3949847
283
64-67
2.3/2.0
3
Nodular Iron
3951130
327
2.45/2.10
3.25
Forged
3951529
400
70-80
2.65/2.10
3.75
Nodular Iron
10106122
350
90-95
2.76/2.10
3.66
Forged LT-5 ZR-1
10168568
265
2.45/2.10
3
Cast One Piece Seal
12552216
346
2.558/2.10
3.62
Cast LS-1 One Piece Seal
14088526
305
1986
2.45/2.10
3.48
Nodular Iron One piece seal
14088532
350
86-88
2.45/2.10
3.48
Forged One piece seal
14088535
305/350
86 & UP
2.45/2.10
3.48
Nodular Iron One piece seal
14088552
350
86 & UP
2.45/2.10
3.48
Forged One piece seal
Big Block Crankshaft
Casting Number
CID
Years
Journals
Stroke
Comments
3520
454
2.75/2.20
4
Forged
3521
454
70-88
2.75/2.20
4
Forged LS-6
3524
454
2.75/2.20
4
Forged
6223
366/396/402/427
68-76
2.75/2.20
3.76
Forged
7115
366/396/402/427
65-76
2.75/2.20
3.76
Forged
7416
454
70-88
2.75/2.20
4
Forged
7463
454
2.75/2.20
4
Forged
336782
454
2.75/2.20
4
Cast
353039
454
70-88
2.75/2.20
4
Nodular Iron
353638
454
2.75/2.20
4
359730
454
2.75/2.20
4
3732692
348
2.75/2.20
4
3732692
348
1958
2.50/2.20
3.25
Forged
3733223
409
62-65
2.50/2.20
3.5
Forged
3733223
348
2.50/2.20
3.25
Forged
3733226
348
2.50/2.20
3.25
Forged
3733226
348
1958
2.50/2.20
3.25
Forged
3741640
348
2.50/2.20
3.25
Forged
3741640
348
59-61
2.50/2.20
3.25
Forged
3741642
348
2.50/2.20
3.25
Forged
3741642
348
59-61
2.50/2.20
3.25
Forged
3788072
409
1961
2.50/2.20
3.5
Forged
3788072
409
2.50/2.20
3.5
Forged
3795589
409
61-62
2.50/2.20
3.5
Forged
3795589
409
2.50/2.20
3.5
Forged
3804816
366/396/402/427
61-76
2.75/2.20
3.76
Nodular Iron
3815822
348
58-61
2.50/2.20
3.25
Forged
3815822
348
2.50/2.20
3.25
Forged
3824553
348
58-61
2.50/2.20
3.25
Forged
3824553
348
2.50/2.20
3.25
Forged
3829027
409
2.50/2.20
3.5
Forged
3829027
409
1963
2.50/2.20
3.5
Forged
3837466
409/427
2.50/2.20
3.65
Forged Z-11Special performance
3837466
409
1963
2.50/2.20
3.5
Forged Z-11
3838416
409
64-65
2.50/2.20
3.5
Forged
3838416
409
2.50/2.20
3.5
Forged
3856223
396/402
65-71
2.75/2.20
3.76
Nodular Iron
3863114
402
2.75/2.20
3.76
3863144
366/396/402
68-85
2.75/2.20
3.76
Forged
3874874
366/396/402/427
66-85
2.75/2.20
3.76
Forged
3879621
427
2.75/2.20
3.76
Forged
3882841
396
2.75/2.20
3.76
Forged
3882842
366/396/427
2.75/2.20
3.76
Forged
3882849
366/396/427
2.75/2.20
3.76
Forged
3887114
396
2.75/2.20
3.76
Forged Special performance
3904815
366/396/402/427
65-76
2.75/2.20
3.76
Nodular Iron
3962523
454
2.75/2.20
4
Forged
3963521
454
2.75/2.20
4
Forged Special performance
3963524
454
70-72
2.75/2.20
4
Forged
3965746
NA
NA
NA
Semi finished Forged crank
3965753
NA
NA
NA
Semi finished Forged
3967416
454
70-71
2.75/2.20
4
Forged
3967463
454
70-88
2.75/2.20
4
Forged
3975495
454
2.75/2.20
4
3975945
454
2.75/2.20
4
3993804
NA
NA
NA
Raw Forged crank
3993878
454
2.75/2.20
4
Forged
10051169
NA
NA
NA
Raw Forged
10114186
427
2.75/2.20
3.76
Forged
10114187
396
2.75/2.20
3.76
Cast
10114188
454
2.75/2.20
4
Cast One Piece Seal
14097044
454/502
2.75/2.20
4
Forged One Piece Seal
Cylinder Head ID
Use these casting numbers to identify the heads you have.
Small Block Casting numbers
Casting Number
CID
Years
Valves
Comments
10065202
350
82-86
1.94/1.50
76cc
10065203
350
82-86
1.94/1.50
76cc
10065204
350
82-86
1.94/1.50
76cc
10065205
305
82-86
1.84/1.50
58cc
10065206
350
82-86
1.94/1.50
76cc
10065207
305
82-86
1.84/1.50
58cc
10088113
350
86-92
1.94/1.50
58cc Corvette Aluminum
10120928
350
87-94
1.94/1.50
76cc
10125320
350
94-96
2.00/1.55
Gen II LT1 cast iron version,
10128374
350
92-97
2.00/1.55
Gen II LT1 53 CC angle plug aluminum
10134363
Bowtie High Port 60 CC 210 ~ 258 CC
10159550
350
87-94
1.94/1.50
76cc
10159551
305
87-94
1.84/1.50
58cc
10159552
350
87-94
1.94/1.50
76cc
10159553
305
87-94
1.84/1.50
58cc
10185040
Splayed vavle head 45 CC angle plug
10205245
350
93
2.00/1.55
Gen II LT1 angle plug aluminum reverse flow cooling 175/68cc ports
10207643
350
94-97
2.00/1.55
Gen II LT1 angle plug aluminum reverse flow cooling 175/68cc ports
10208890
265
94-96
2.00/1.55
Gen II L99 4.3 Liter V-8, cast iron, reverse flow
10215339
346
97
2.00/1.55
Gen III LS1 aluminum 68cc
10239906
305/350
96-up
1.94/1.50
68cc Vortec
12367713
2.00/1.55
GM Fast burn 62 CC 210 CC intake runner angle plug Vortec
12480005
346
0
2.125/1.625
Gen III LS1 "GTZ" aluminum 38cc angle plug
12480011
SB2.2 head 48 ~ 54 CC angle plug 284 CC intake runner Bare heads.
12480034
2.02/1.60
Bowtie Phase III 64cc Angle plug 184 cc intake runner
12506450
350
87-94
1.94/1.50
76cc
12509859
305
87-94
1.84/1.50
58cc
12516852
350
87-94
1.94/1.50
76cc
12551561
350
96
2.00/1.55
Gen II LT1 angle plug aluminum reverse flow cooling
12552520
305
97-99
1.84/1.5
Vortec Truck L-35
12554290
350
94-96
2.00/1.55
Gen II LT1 cast iron version
12555690
350
96
2.00/1.55
Gen II LT-4 55 CC 195 CC intake runner Angle Plug
12555690
350
96
2.00/1.55
Gen II LT-4 55 CC 195 CC intake runner Angle Plug
12556743
325
99 & UP
2.00/1.55
Gen III 5.3L aluminum truck and van
12558059
305
97
1.84/1.5
L-35 Vortec truck
12558062
350
98
1.94/1.5
L-31 Vortec truck 64cc chambers 170cc intake port
12558062
305/350
96-up
1.94/1.50
68cc Vortec
12558806
346
97-98
2.00/1.55
Gen III LS1 aluminum 68cc
12559853
346
99 & UP
2.00/1.55
Gen III LS1 aluminum 68cc
12559895
325
00 & UP
2.00/1.55
Gen III 5.3L aluminum
12564241
346
00 & UP
2.00/1.55
Gen III LS1 aluminum 68cc
12564243
346
2
2.00/1.55
Gen III LS6 aluminum 68cc
12564243
346
2.00/1.55
Gen III LS-6 vette head 65 CC
14008856
267
79-81
1.71/1.50
14010201
305
82-85
1.84/1.50
58cc
14011034
350
80-up
2.02/1.60
64cc Bowtie
14011049
350
82-up
2.02/1.60
64cc Bowtie Aluminum
14014415
267/305
80-85
1.71/1.50
64cc Crack prone
14014416
267/305/350
80-86
1.84/1.50
64cc Crack prone
14019821
350
80-86
1.84/1.50
76cc
14019924
267
79-81
1.71/1.50
14019926
305
80-86
1.84/1.50
14020516
305/350
80-86
1.84/1.50
14020517
350
80-86
1.84/1.50
76cc
14020555
305
81
14020556
350
81
14022206
350
80
1.94/1.50
76cc
14022301
305
80-86
1.84/1.50
58cc
14022601
267/305
79-86
1.72/1.50 1.84/1.50
58cc
14022801
305
80-86
1.72/1.50
58cc
14034806
267
78-82
1.72/1.50
14034807
305
78-82
1.72/1.50
14034808
350
80-86
1.84/1.50
76cc
14034810
350
80-86
14034811
350
80-86
14039121
305
81-86
14039122
305
81-86
14071114
350
80-86
14075381
350
80-86
14079261
350
82-85
14085844
350
80-86
14089119
350
80-86
14096217
350
90-up
1.94/1.50
64cc Crate heads
14101081
305
87-94
1.84/1.50
58cc
14101083
350
88-94
1.94/1.50
64 cc
14102187
305
87-95
1.84/1.50
58cc
14102191
305/350
87-95
1.84/1.50
14102193
305/350
87-95
1.84/1.50
24502559
96-97
Bowtie SB2 1st design"mirror ports" aluminum
25534351C
2.00/1.55
Vortec Bowtie 65 CC 175 cc intake runner
25534371C
2.00/1.55
Vortec Bowtie 65 CC 206 cc intake runner
3238882
350
68-69
1.94/1.50
76cc
3297185
307/327/350
57-67
1.72/1.50
330545
350/400
71-75
2.02/1.60
76cc
330862
400
71-73
1.94/1.50
333881
350
71-76
2.02/1.60
76cc
333882
350/400
70-80
1.94/1.50
76cc
340292
350
73-80
2.02/1.60
64cc Angle plugs turbo' head No heat riser
354434
262/305
75-80
1.72/1.50
60cc
358741
262/305
71--79
1.72/1.50
359944
350
71-79
1.94/1.50
76cc
3636839
265
55
1.72/1.50
3703523
265
55
1.72/1.50
195HP
3713358
265
55-56
1.72/1.50
3713569
265
55-56
1.72/1.50
3725306
265
56
1.72/1.50
210HP Corvette
3731262
265
56
1.72/1.50
Dual Quad Corvette
3731539
283
57-66
1.72/1.50
283HP Corvette
3731544
265/283
55-61
1.72/1.50
Dual Quad Corvette
3731554
265/283
55-63
1.72/1.50
3731556
283
57
1.72/1.50
3731762
265
56
1.72/1.50
Dual Quad Corvette
3737775
283/327
62-67
1.72/1.50
3740997
283
57
1.72/1.50
Dual Quad FI & 4-brl 220-270HP
3743056
283
58
1.72/1.50
3743096
327
62-67
1.72/1.50
3747363
265
57-62
1.72/1.50
3748056
327
62-67
1.72/1.50
3748720
283
57-58
1.72/1.50
Dual Quad FI & 4-brl Corvette
3748770
283
55-62
1.72/1.50
Dual Quad FI & 4-brl Corvette
3748772
283
57-62
1.72/1.50
Dual Quad FI & 4-brl Corvette
3755537
283
57-62
1.72/1.50
3755538
283
59
1.72/1.50
250-290HP FI Corvette
3755539
283
58-62
1.72/1.50
3755549
283
57-62
1.72/1.50
3755550
283
57-62
1.72/1.50
Dual Quad FI & 4-brl Corvette
3755585
327
62-67
1.72/1.50
3755896
283
62-64
1.72/1.50
3760116
283
59
1.72/1.50
Dual Quad FI & 4-brl Corvette
376445
350
80-84
1.72/1.50
376450
262/305
75-76
1.72/1.50
376495
350
Jun-79
1.94/1.50
76cc
3767460
265/283/327
55-67
1.72/1.50
Car & Truck Corvette
3767462
327
62-67
1.72/1.50
3767465
283
60-61
1.72/1.50
Dual Quad FI & 4-brl Corvette
3767754
283
60-61
1.72/1.50
3767792
283
60-67
1.72/1.50
3770126
327/350
67-70
1.94/1.50
3773012
265
55
1.72/1.50
3774634
327
64-67
1.72/1.50
3774682
283/327
60-67
1.72/1.50
3774684
283/327
57-67
1.72/1.50
3774690
283
58
1.72/1.50
FI Corvette
3774692
283
58-64
1.72/1.50
Dual Quad FI & 4-brl Corvette
3782461
302/327/350
61-70
1.94/1.50
Dual Quad FI & 4-brl Corvette 2.02/1.60 Doubble humps 64cc
3782462
327
67
1.94/1.50
Corvette 2.02/1.60
3792563
327
65-67
3795896
283/307/327
58-72
1.72/1.50
60cc
3796896
283
64-67
1.72/1.50
60cc Chevy II
3798996
327
63-67
3814462
350
67
1.94/1.50
3814480
283/327
60-67
1.72/1.50
3814482
327
62-67
1.72/1.50
3817680
283
59
1.72/1.50
FI 4-brl
3817681
327
62-67
1.72/1.50
3817682
283
61-62
1.72/1.50
3836839
265
55
1.72/1.50
3836842
283/327
57-67
1.72/1.50
3836924
283
63-64
1.72/1.50
3836942
283
58-62
1.72/1.50
3837063
283
58-62
1.72/1.50
3837064
265/283
56-62
1.72/1.50
3837065
265
55-56
1.72/1.50
3837775
283/327
62-67
1.72/1.50
383882
400
71-73
3848720
283
57-58
1.72/1.50
3849820
327
65
1.72/1.50
3854520
283/327
62-67
1.72/1.50
3867802
283
57-60
1.72/1.50
FI Corvette
3873064
265
56-57
1.72/1.50
3876487
350
71-73
1.94/1.50
76cc
3876775
283/327
57-67
1.72/1.50
76cc
3878775
327
64-67
1.72/1.50
3884520
283/327
60-67
1.72/1.50
60cc
3890462
302/327/350
62-68
1.94/1.50 2.02/1.60
64cc Doubble humps
3891462
302/327/350
62-67
1.94/1.50 2.02/1.60
64cc
3891492
327
64-67
1.94/1.50
3911011
327
68
3911032
307/327
68-70
1.72/1.50
70cc
3912264
283
58-62
1.72/1.50
3912265
283
63-64
1.72/1.50
3912291
302/327/350
68-70
1.94/1.50 2.02/1.60
64ccDoubble humps
3912311
350
67
1.94/1.50
3912313
327
65-73
1.72/1.50
3917264
302
67
2.02/1.60
64cc Z-28
3917290
327
68-70
1.72/1.50
3917291
302/327/350
62-69
1.94/1.50 2.02/1.60
64cc Doubble humps
3917292
327
67-68
1.94/1.50
3917293
307/327
68-69
1.72/1.50
76cc
3921175
327
66
1.94/1.50
3923441
350
67-76
1.94/1.50
76cc
3927185
307/327/350
68-79
1.72/1.50
70cc
3927186
302/327/350
68-72
1.94/1.50 2.02/1.60
64cc Doubble humps Bolt holes
3927187
302/350
69-70
2.02/1.60
64cc Corvette
3927188
307/327/350
69
1.72/1.50
76cc
3928454
307
68
1.72/1.50
3928455
302/327
68
2.02/1.60
64cc 325 & 350HP
3928494
327
68
2.02/1.60
64cc 350HP 4-brl
3928495
327
68
1.72/1.50
3931633
307
68-73
1.72/1.50
3931635
350
68-76
1.94/1.50
76cc
3931637
327
68-69
3931638
327
68
1.72/1.50
3931639
302
68
2.02/1.60
64cc
3932441
327/350
67-79
1.94/1.50
76cc
3932454
307/350
68-799
1.72/1.50
76cc
3933148
350
68-73
76cc
3941174
327
68
1.72/1.50
3946812
350
69
1.72/1.50
3946813
350
69-79
76cc
3947014
350
68-70
3947040
302/327/350
68-70
1.94/1.50 2.02/1.60
64cc
3947041
302/327/350
68-79
1.94/1.50 2.02/1.60
64cc
3951598
400
70-71
1.94/1.50
76cc
3961598
400
70-76
1.94/1.50
76cc
3964286
350
68-77
1.94/1.50
76cc
3970126
327/350
67-79
1.72/1.50
3973195
400
71-73
1.94/1.50
76cc
3973414
327/350
64-70
2.02/1.60
64cc Z-28 LT-1 corvette
3973487
350
68-79
1.94/1.50 2.02/1.60
76cc
3973487X
350
68-73
1.94/1.50 2.02/1.60
76cc X cast 10cc's
3973493
400
70-76
1.94/1.50
76cc
3986316
350
71-72
2.02/1.60
76cc
3986330
350
69-79
1.94/1.50
76cc
3986339
307/350
68-79
1.72/1.50
76cc
3986388
350
68-79
1.72/1.50
76cc
3990941
307/350
68-82
3991492
327/350
68-73
1.94/1.50 2.02/1.60
64cc Angle plug
399380
400
70-73
76cc
3997417
307
71
1.72/1.50
3998916
350/400
72-75
2.02/1.60
76cc
3998920
350
72-75
1.94/1.50
76cc
3998991
307/350
68-79
1.72/1.50
76cc
3998993
307/350
68-79
1.71/1.50 1.94/1.50
76cc
3998997
350/400
71-73
1.94/1.50
76cc
426424
305/350/400
72-82
1.72/1.50
458624
350
69-84
1.94/1.50
76cc
460703
350
78-80
1.94/1.50
76cc
462614
305/350
77-79
1.72/1.50
462624
350
76-87
1.94/1.50 2.02/1.60
76cc Crack prone
464033
350
76-86
1.94/1.50
76cc
464036
350
76-86
1.94/1.50
76cc
468642
350/400
75-84
1.72/1.50
471513
267
79-81
1.72/1.50
472424
305
76-79
1.72/1.50
474213
305
78-82
1.72/1.50
474214
350
78-82
1.94/1.50
76cc
475590
400
78-82
1.94/1.50
76cc
517513
267
79-81
1.72/1.50
6259515
350
73
6260855
350
73-75
1.94/1.50
76cc
6260856
350
73-76
1.94/1.50
76cc
6272070
350
73
10045427
Pontiac/Chevy Aluminum, 91cc chamber Large Rectangle Port
10049875
Pontiac/Chevy Aluminum Small Rectangle port
10051128
454
90-94
2.19/1.88
72cc Bowtie Aluminum Rectangular port 400cc intake
10052902
427
Oval Port Open chamber
10101136
454
91-94
2.06/1.77
Open chamber Oval port
10101140
366/427
91-01
Oval Port Closed chamber
10114156
454
91-01
Oval Port Open chamber
10121033
454
78-88
2.06/1.77
Open chamber Oval port
10141279
454
96-01
Vortec 7400 100cc chambers Oval Port
10487052
366
77-90
Oval Port Open chamber
12352783
454
79-93
2.06/1.77
Open chamber Oval port
12363391
Oval Port Bowtie Aluminum Signature Series
12363401
Rectangle Port Bowtie Aluminum Signature Series
12558162
496
01 & UP
Gen.VII Vortec 8100 8.1L truck
12560241
454
98-01
Vortec 7400 100cc chambers Oval Port
12562932
454/502
91-95
Oval Port truck crate motor 118cc chambers
12562934
502
00 & UP
GenVI Marine
14011077
454
89-94
2.19/1.88
118cc Replacement Aluminum Rectangular port 295cc intake
14025175
454
83-93
2.06/1.77
Open chamber Oval port
14044861
454
89-94
2.19/1.88
106cc Bowtie Aluminum Rectangular port 380cc intake
14081044
454
86-90
2.06/1.77
Open chamber Oval port
14081045
454
78-87
Oval Port Open chamber
14081052
366/427/454
85-87
Oval Port Open chamber
14092359
427
86-89
2.06/1.77
Open chamber Oval port
14092360
454
85-89
2.06/1.77
Open chamber Oval port
14096188
454
87-94
2.19/1.88
118cc Replacement Rectangular port 325cc intake
14097088
502
89-date
2.19/1.88
118cc Replacement Rectangular port 325cc intake GEN V
14101398
454
86-90
2.06/1.77
Open chamber Oval port
24502585
Olds/Chevy DRCE 2 Pro Stock aluminum
330864
366/427/454
70-81
2.06/1.77
Open chamber Oval port
330865
366/427/454
70-84
2.06/1.77
Open chamber Oval port
330866
366/427
68-78
Oval Port Open chamber
330867
427
68-73
Oval Port Open chamber
336768
427
73-76
Oval Port Open chamber
336781
454
73-85
2.06/1.77
113cc Oval port
343771
366/427/454
68-85
2.06/1.77
Open chamber Oval port
343772
366/427/454
76-84
2.06/1.77
Open chamber Oval port
343783
454
75-78
2.06/1.77
Open chamber Oval port
346236
454
75-87
2.06/1.77
113cc Oval port
346238
454
75-87
2.06/1.77
113cc Oval port
352625
454
70-76
Oval Port Open chamber
353049
454
70-73
2.06/1.77
113cc Oval port
366765
427/454
73-84
2.06/1.77
Open chamber Oval port
3732791
348
58
3758379
348
59-61
3759256
348
58
3767738
348
59-61
3781147
348
60-61
High Perf
3795586
409
61
360HP
3814690
409
62-64
High Perf
3819333
348/409
62-65
3830817
409
63-65
340HP
3837731
409
63
High Perf Z-11
3852583
409
65
400HP
3856206
396
65-66
2.06/1.77
98cc Oval port
3856208
396
65
2.06/1.77
109cc Z-16/L-37 Rectangular port
3856213
366
66-70
2.06/1.77
Closed chamber Oval port
3856260
396
68
Oval Port Closed chamber
3872702
396/427
66
2.06/1.77
98cc Oval port L-34/L-35/L-36
3873858
396/427
66-67
2.06/1.77
109cc L-78/L-72 Rectangular port
3876875
427
66-70
2.06/1.77
Closed chamber Oval port
3904390
396/427
66-67
2.06/1.77
98cc Oval port L-34/L-35/L-36
3904391
396/427
65-67
2.06/1.77
107cc L-78/L-71/L-72 Rectangular port
3904392
427
67
2.19/1.88
106cc L-88/L-89 Aluminum Rectangular port
3904393
366
66-68
2.06/1.77
Closed chamber Oval port
3908952
427
67
Oval Port Open chamber
3909802
396/427
66-67
2.06/1.77
100cc Oval port L-34/L-35/L-36/L-68
3917215
396/427
67-69
2.06/1.77
100cc Oval port L-34/L-35
3917219
366/427
66-70
2.06/1.77
Closed chamber Oval port
3919840
396/427
67-69
2.06/1.77
107cc L-78/L-71/L-72 Rectangular port
3919842
396/427
68-69
2.19/1.88
106cc L-88/L-89 Aluminum Rectangular port
3931063
396/427
69-70
2.06/1.77
100cc Oval port L-34/L-35
3933148
366/396/427
69
2.06/1.77
122cc Oval port
3933149
427
69-70
2.06/1.77
122cc Oval port
3935401
427
68-76
Oval Port Open chamber
3946074
396/454
69-71
2.19/1.88
118cc L-88/ZL-1 Aluminum Rectangular port
3964280
427/454
66-70
2.06/1.77
Closed chamber Oval port
3964290
396/402/427/454
69-70
2.06/1.77
100cc Oval port
3964291
396/402/427/454
69-70
2.19/1.88
108cc L-78/L-71/L-72/LS-6 Rectangular port 325cc intake
3964292
454
70
2.19/1.88
109cc LS-6 Rectangular port
3965198
396
69
2.06/1.77
Open chamber Oval port
3975950
366/427
68-70
2.06/1.77
Closed chamber Oval port
3986133
366/427
70-85
2.06/1.77
Closed chamber Oval port
3986136
366/427
70-84
2.06/1.77
Closed chamber Oval port
3993820
402/454
71
2.06/1.77
113cc Oval port
3994025
454
71
2.19/1.88
118cc LS-6 Rectangular port
3994026
454
71
2.19/1.88
118cc LS-6 Rectangular port
3999241
402/454
72
2.06/1.77
113cc Oval port
473328
366
68-85
2.06/1.77
Open chamber Oval port
6258723
454
71
2.19/1.88
118cc LS-6 Rectangular port
6272292
402/454
71
2.06/1.77
Open chamber Oval port
6272990
454
71-94
2.19/1.88
118cc Replacement Rectangular port 325cc intake
Use these casting numbers to identify the exhaust manifolds you have.
Casting Number
Years
Engine
Side
Comments
336706
74-78
350
RH
336707
74-78
350
LH
336708
74-78
350
RH
336709
74-78
350
RH
Camaro & Z-28 with A.I.R.
336710
74-78
307, 350 & 400
LH
Chevelle, Camaro, Z-28, Nova and Passenger with A.I.R.
346222
74-80
307, 350 & 400
RH
Chevelle, Camaro, Nova and Passenger with A.I.R.
346247
75-77
262, 350 & 400
LH
Chevelle, Camaro, Monte Carlo and Passenger 110, 145, 155 & 175 HP
346248
75-77
262, 350 & 400
RH
Chevelle, Camaro, Monte Carlo and Passenger 110, 145, 155 & 175 HP
354432
75-76
262
RH
110 HP
354433
75-76
262
LH
110 HP
364753
76-80
307, 350 & 400
LH
Camaro, Monte Carlo, Malibu and Passenger
372243
74-83
307, 350 & 400
RH
Corvette and Replacement manifold
462697
77-79
267 & 305
LH
Monte Carlo and Malibu
462698
77-83
267 & 305
RH
Monte Carlo and Malibu
474008
78-82
267, 305 & 350
RH
745994
80-86
267 & 305
LH
3704791
55-56
265
LH
Corvette and Passenger 195 HP
3704792
55-56
265
RH
Corvette and Passenger 195 HP
3725563
56
265
LH & RH
Corvette and Passenger 210 HP 2-Bolt Flange
3731557
56
265
LH
Corvette and Passenger 225 HP
3731558
56
265
RH
Corvette and Passenger 225 HP
3732498
58
283
RH
Corvette FI
3733975
57
283
LH
Corvette and Passenger 220, 245, 250, 270 & 283 HP
3733976
57
283
RH
Corvette and Passenger 220, 245, 250, 270 & 283 HP
3737902
62-65
327
RH
300, 340, 360, 365 & 375 HP 2.5" Outlet
3746563
65
327
LH
300 HP
3747038
58-65
283 & 327
RH
Corvette and Passenger 220, 250 & 300 HP 1.9" Outlet
3747042
58-68
283, 307 & 327
RH
Corvette and Passenger 195, 200, 220, 250, 270, 275, 290, 300 & 350 HP 1.9" Outlet
3747938
64
327
LH & RH
250 & 300 HP
3747942
65
327
LH & RH
250, 350 & 365 HP
3749965
58-63
283 & 327
LH
Corvette and Passenger 230, 245, 250, 270, 275, 290, 300 & 315 HP
3750556
58-65
283 & 327
RH
Corvette and Passenger 230, 245, 250, 270, 275, 290, 300 & 315 HP
3780728
64-67
327
LH
Chevy II
3790729
64-67
283 & 327
LH
195, 220, 250, 270, 275, 300 & 350 HP 2.0" Outlet Chevy II
3790730
64-65
283 & 327
RH
220, 250 & 300 HP 1.9" Outlet Chevy II
3791162
65-66
283 & 327
RH
Chevy II with AC
3791182
66-67
283 & 327
RH
Passenger with AC
3797901
62-63
327
LH
Corvette 300, 340 & 360 HP
3797902
62-65
327
RH
Corvette 300, 340, 360, 365 & 375 HP 2.5" Outlet
3797942
63-65
327
LH & RH
Corvette 300, 360, 365 & 375 HP 2.5" Outlet
3834947
64-68
283, 307 & 327
LH
Chevelle 195, 200, 210, 220, 250, 275, 295, 300, 325, 350 & 365 HP 2.0" Outlet
3836968
55-56
265
RH
Corvette and Passenger 195 HP
3837069
55
265
LH
Corvette and Passenger 195 HP
3840715
64
283 & 327
LH
Chevelle
3840912
64-68
283, 307, 327 & 350
RH
Chevelle, Camaro and Nova 195, 200, 210, 220, 250, 275, 295, 300, 325, 350 & 365 HP 1.9" Outlet
3846559
64-71
327 & 350
LH
Corvette 250, 270, 300 & 350 HP 2.0" Outlet
3846563
64-65
327
LH
Corvette 300, 350 & 365 HP 2.5" Outlet
3846659
66
327
LH
350 HP
3849288
64-67
283 & 327
RH
195, 220, 275 & 350 HP 1.9" Outlet Chevy II
3849290
64-67
283 & 327
RH
195, 220, 275 & 350 HP 1.9" Outlet Chevy II with AC
3855163
65-68
283, 307 & 327
LH
Passenger and Truck 195, 200, 220, 250 & 275 HP 2.0" Outlet
3872723
66-67
283 & 327
LH
195, 220, 275 & 350 HP 2.0" Outlet Chevy II A.I.R.
3872729
66
283 & 327
LH
Chevelle 195,220, 275 & 350 HP 2.0" Outlet A.I.R.
3872730
66-68
283, 302, 307 & 327
RH
Chevelle, Camaro & Z-28 200, 210, 220, 250, 275, 290, 325 & 350 HP 1.9" Outlet A.I.R.
3872738
66-67
283 & 327
RH
195, 220, 275 & 350 HP 1.9" Outlet Chevy II
3872741
66-68
283, 307 & 327
LH
Passenger 195, 200, 220, 250 & 275 HP 2.0" Outlet A.I.R.
3872765
67-71
327 & 350
LH
Corvette 300, 330, 350 & 370 HP 2.0" Outlet A.I.R.
3872778
66-68
283, 307 & 327
RH
Corvette, Passenger and Truck 195, 200, 250, 275, 300 & 350 HP 1.9" Outlet A.I.R.
3887186
66
283
RH
220 HP 1.9" Outlet
3890424
64-67
283 & 327
RH
Chevy II
3892679
66-68
283, 302, 307, 327 & 350
LH
Chevelle, Camaro and Z-28 195, 200, 210, 220, 250, 275, 290, 295 & 325 HP 2.0" Outlet
3892683
66-68
283, 302, 307, 327 & 350
LH
Chevelle, Camaro and Z-28 195, 200, 210, 220, 250, 275, 290, 295 & 325 HP 2.0" Outlet
3893604
66-68
283 & 327
RH
Passenger A.I.R.
3893608
67-68
283, 302, 307, 327 & 350
RH
Chevelle, Camaro and Z-28 195, 200, 210, 250, 275, 290, 295 & 325 HP 1.9" Outlet
3896956
67-68
283 & 327
RH
Truck
3905364
69-72
307, 350 & 400
RH
Truck
3932376
69-70
307, 327, 350 & 400
RH
Chevelle and Camaro 200, 210, 250, 255, 265 & 300 HP 1.9" Outlet
3932461
69-74
327 & 350
LH & RH
Corvette 190, 195, 200, 235, 255, 300, 330 & 350 HP 1.9" Outlet A.I.R.
3932465
69-70
327, 350 & 400
RH
Passenger 235, 250, 255, 265, 300 & 350 HP 1.9" Outlet
3932469
69-70
327 & 350
LH
Passenger 235, 250, 255 & 300 HP 2.0" Outlet
3932473
69-70
327, 350 & 400
LH
Passenger 235, 250, 255, 265 & 300 HP 2.0" Outlet
3932481
69
350
RH
Corvette
3940972
67
350
RH
Camaro 295 HP
3942527
69-70
302, 307, 327 & 350
LH
Chevelle, Camaro, Z-28 and Nova 200, 210, 250, 255, 290, 300 & 360 HP 2.0" Outlet A.I.R.
3942529
69-70
302, 307, 327, 350 & 400
LH
Chevelle, Camaro and Nova 200, 210, 250, 255, 290 & 300 HP 2.0" Outlet
3946826
69-70
302, 307, 327 & 350
RH
Chevelle, Camaro, Z-28 and Nova200, 210, 250, 255, 290, 300 & 360 HP 1.9" Outlet A.I.R.
3959562
72-74
307, 350 & 400
RH
Chevelle, Camaro and Z-28 115, 130, 145, 150, 160, 165, 170, 175, 180, 185 & 245 HP 2.0" Outlet A.I.R.
3973432
70-74
307, 350 & 400
RH
Chevelle, Camaro, Nova and Passenger 115, 130, 150, 165, 170, 175, 180, 200, 245, 250, 255, 270 & 300 HP 2.0" Outlet
3986330
69-73
302, 307, 327 & 350
RH
Camaro and Z-28 200, 210, 245, 250, 255, 290, 300, 330 & 360 HP 1.9" Outlet A.I.R.
3989036
71-75
350
LH & RH
Corvette and Passenger 165, 195, 200, 205 & 270 HP 2.0" Outlet with and without A.I.R.
3989041
69-74
302, 307, 327, 350 & 400
LH
Camaro, Z-28 and Nova 115, 130, 145, 150, 160, 165, 170, 180, 185, 200, 210, 245, 250, 255, 290, 300, 330 & 360 HP 2.0" Outlet with and without A.I.R.
3989043
70-73
307, 350 & 400
LH
Chevelle, Camaro, Nova and Passenger 105, 115, 130, 145, 150, 165, 175, 185, 200, 245, 250, 255, 270 & 300 HP 2.0" Outlet with and without A.I.R.
3989055
69-72
307, 350 & 400
LH
3997742
71-78
307 & 350
RH
2.0" Outlet
3998902
72-78
307 & 350
RH
10045315
88-94
305 & 350
LH
10045317
88-94
305 & 350
LH
10045317
88-94
305 & 350
LH
10046123
87-92
305 & 350
LH
10046139
84-85
350
LH
10046140
84-85
350
RH
10055734
87-91
350
RH
10092901
89-91
350
LH
10092903
89-94
350
LH
10092905
89-94
350
LH
10108437
87-93
305 & 350
RH
10128448
91-93
305 & 350
LH
10128483
91-93
305 & 350
LH
10166144
91-94
350
RH
10166145
87-90
305 & 350
LH
10166147
89-94
305 & 350
LH
10166158
89-94
305 & 350
RH
10168494
94
265 & 350
LH
10207656
93-94
350
LH
10207657
93
350
RH
10433037
82-86
305
LH
12550621
94
265
RH
12550622
91
350
RH
14007400
80-86
267 & 305
LH
14014437
80-84
305
LH
14014438
80-84
305
RH
14014459
81-86
305 & 350
LH
14014500
79-86
267, 305 & 350
RH
14022625
80-81
305
LH
14031361
82-86
305
RH
14031376
81-86
350
RH
14034069
81-86
350
RH
14034075
81-86
305 & 350
LH
14043373
82-86
305
LH
14050233
83-86
305 & 350
LH
14050282
83-87
305 & 350
RH
14050287
82-86
305
LH
14057029
84-85
350
LH
14057030
84-85
350
RH
14060630
81-86
350
RH
14060633
81-86
305 & 350
LH
14067365
77-86
267, 305, 350 & 400
LH
14068667
85-88
350
LH
14068670
85-88
350
RH
14071200
83-86
305
RH
14075611
83-86
305
LH
14079295
85-86
305 & 350
LH
14079296
85-86
305 & 350
RH
14087511
86-91
350
LH
14087512
86-91
350
RH
14093653
87-90
305 & 350
LH
14093654
87-90
305 & 350
RH
14093655
87-90
305 & 350
LH
14093658
88-94
305 & 350
RH
14093660
87-90
305 & 350
RH
14093682
87-90
305 & 350
RH
14094045
87-90
305 & 350
LH
14094063
87-92
305 & 350
LH
14094064
87-92
305 & 350
RH
14094065
85-88
350
RH
14101054
87-88
305 & 350
RH
14102016
88-94
305 & 350
RH
14102018
89-94
305 & 350
RH
14103206
87-91
305 & 350
RH
14103207
87-91
305 & 350
LH
329225
73-76
454
LH
Chevelle and Passenger with and without A.I.R.
353028
73-76
454
LH
Chevelle and Passenger with and without A.I.R.
353030
73-76
454
LH
Police
3732793
58-61
348
LH
Passenger
3732794
58-61
348
RH
Passenger
3767583
59-61
348 & 409
LH
Passenger
3767584
59-61
348 & 409
RH
Passenger
3814682
62-64
409
RH
Passenger
3814683
62-64
409
LH
Passenger
3822925
62-64
409
LH
Passenger & Z-11
3822926
62-64
409
RH
Passenger & Z-11
3855161
65
409
LH
Passenger 340 & 400 HP
3855162
65
409
RH
Passenger 340 & 400 HP
3856297
65
396
LH
325 HP
3856301
65
396
LH
425 HP Corvette
3856302
65
396
RH
425 HP Corvette
3856306
65
396
RH
Passenger 325 HP
3857297
65
396
LH
Passenger 325 HP
3868874
65-66
396
RH
Chevelle 325, 360 & 375 HP Z-16
3869925
65
396
LH
Chevelle 375 HP Z-16
3872770
66
396
RH
3880827
66-69
427 & 454
LH
Corvette
3880828
66-72
427 & 454
RH
Corvette 270, 365, 390 & 425 HP with and without A.I.R. LS-5 & LS-6
3880869
70-72
454
LH
Corvette 365 & 425 HP with and without A.I.R. LS-5 & LS-6
3883827
66
427
LH
Passenger
3883828
66
427
RH
Passenger
3883999
66
396
LH
Chevelle 325, 360 & 375 HP
3884504
66-67
396 & 427
RH
Passenger 325, 385 & 390 HP
3892307
66-67
396 & 427
LH
Passenger 325 & 390 HP
3902401
67
396
LH
Chevelle
3904399
66
396
LH
3909879
67-70
396, 427 & 454
LH
Chevelle, Camaro and Nova 325, 350, 375, 425, 430 & 450 HP LS-6 COPO
3909880
67
396
RH
Chevelle and Camaro 325, 350 & 375 HP
3914613
68-70
396 & 427
LH
Passenger 265, 325, 335, 345, 390 & 425 HP
3916178
68-70
396, 427 & 454
RH
Chevelle, Camaro, Nova and Passenger 325, 350, 375, 425, 430 & 450 HP COPO LS-5 & LS-6
3969869
70-74
454
LH
Corvette 270, 365 & 390 HP with and without A.I.R. LS-5
3989310
71-72
402 & 454
RH
Chevelle, Camaro, Monte Carlo and Passenger
3989343
71-72
402 & 454
LH
Chevelle, Camaro, Monte Carlo and Passenger
3994045
73-75
454
LH
Police
Chevy Intake Manifolds
Use these numbers to identify your stock Chevy intake.
Casting Number
CID
Years
Type
Comments
10051103
350
1990
4-Brl
Aluminum Bowtie Single plane
10066013
350
87-89
TPI
Corvette Base MASS air 9th injector style Aluminum heads (86 and older)
10077151
305/350
90-92
TPI
Plenum Speed density type
10086016
305/350
90-92
TPI
Base Speed density type (87 & UP intake bolt pattern)
10108630
350
92-97
MFI
LT-1
12550631
350
96
MFI
LT-4 Power coated red
12552138
265
93-96
MFI
L-99 (lt-1 style 4.3L V-8)
14007374
305
79-82
2-Brl
Aluminum
14014432
350
1981
4-Brl
Aluminum Quadrajet Z-28
14057053
305/350
80-88
4-Brl
Aluminum Quadrajet
14081006
350
87-89
TPI
Corvette Plenum MASS air 9th injector style
14096242
350
1990
4-Brl
Holley High rise Bowtie
340261
350/400
74-76
4-Brl
Quadrajet
340266
305/350/400
73-82
2-Brl
340281
305/350
82-85
4-Brl
Quadrajet
346249
305/350/400
75-77
4-Brl
Quadrajet
346250
305/350
76-82
4-Brl
Quadrajet
346260
267/305/350
73-77
2-Brl
355943
262
1975
2-Brl
3704790
265
1955
2-Brl
3711348
265
1955
4-Brl
WCFB
3728725
265
1956
Dual Quad
Aluminum
3731394
283
56-57
Dual Quad
Aluminum
3731398
283
1957
4-Brl
WCFB
3732690
265/283
56-57
2-Brl
3732880
265/283
56-57
2-Brl
3735444
265
1956
2-Brl
3735448
265
1956
4-Brl
WCFB
373598
305
78-81
2-Brl
Aluminum
3737109
265
1956
4-Brl
WCFB
3739653
283
58-61
Dual Quad
Aluminum
3741193
283
1957
Fuel Injection
Aluminum
3746826
265/283
56-63
2-Brl
3746829
283/327
58-64
4-Brl
WCFB
3753809
283
59-62
2-Brl
3783244
327
62-63
4-Brl
WCFB
3794129
327
1963
4-Brl
Aluminum
3795397
327
1962
4-Brl
Aluminum
3799349
327
62-64
4-Brl
Carter AFB
3826810
327
63-65
Fuel Injection
Aluminum
3837109
265/283
56-57
4-Brl
WCFB
3840905
283
64-65
2-Brl
3844457
283/327
64-65
4-Brl
WCFB
3844459
327
63-65
4-Brl
Carter AFB
3844461
327
64-65
4-Brl
Aluminum
3866922
283/327
62-65
4-Brl
WCFB
3872783
283/327
66-67
4-Brl
Holley
3872788
238/327
66-67
4-Brl
Holley
3875954
327
1966
4-Brl
Carter AFB
3877652
283/327
65-67
2-Brl
3882858
283
1966
4-Brl
Carter AFB
3890490
327
66-67
4-Brl
Aluminum
3905393
327/350
1967
4-Brl
Quadrajet
3910601
327
67-68
2-Brl
3916313
307/327/350/400
69-70
2-Brl
3917610
302
67-68
4-Brl
Aluminum
3919801
307/327
1968
2-Brl
3919803
327/350
67-68
4-Brl
Quadrajet
3927183
307/327
69-70
2-Brl
3927184
350
1969
4-Brl
Quadrajet
3932472
302/350
69-70
4-Brl
Aluminum
3941126
302
68-69
Cross Ram
Aluminum base
3941130
302
68-69
Cross Ram
Aluminum top plate
3958622
307/327
69-70
2-Brl
3958626
350
69-70
2-Brl
3959594
350
71-72
4-Brl
Aluminum
3965577
350
1970
4-Brl
Quadrajet
3972110
350
1970
4-Brl
Aluminum
3972114
350
70-72
4-Brl
Aluminum
3972116
350
1970
4-Brl
Aluminum Service replacement part
3972361
350
1971
4-Brl
Aluminum
3973465
307
69-71
2-Brl
3973467
350/400
1971
2-Brl
3973469
350
1971
4-Brl
Quadrajet
3987361
350
69-70
4-Brl
Quadrajet
3990948
350
1971
2-Brl
3991004
350
1973
4-Brl
Quadrajet
3991005
307
1971
2-Brl
3997770
350
1973
4-Brl
Quadrajet
3997771
350
1973
4-Brl
Quadrajet
3997772
350
1973
2-Brl
3997773
350/400
1973
2-Brl
458520
305/350
77-82
4-Brl
Quadrajet
458520
305/350
82-87
4-Brl
Aluminum
6262928
307
1972
2-Brl
6262930
350
1972
4-Brl
Quadrajet
6262936
307
1972
2-Brl
6263751
350
1972
4-Brl
Quadrajet
6263752
350/400
1972
2-Brl
626932
350
71-72
4-Brl
Quadrajet
6271060
307
1973
2-Brl
6271061
307
1973
2-Brl
7014360
283
1957
Rochester FI
7014520
283
1957
Rochester FI
7014800
283
57-58
Rochester FI
7014800R
283
1985
Rochester FI
7014900
283
1958
Rochester FI
7014900R
283
1958-59
Rochester FI
7014960
283
1958
Rochester FI
7017200
283
59-61
Rochester FI
7017250
283
59-61
Rochester FI
7017300
283
59-60
Rochester FI
7017300R
283
1959
Rochester FI
7017310
283
60-61
Rochester FI
7017320
283
1960
Rochester FI
7017355
327
1962
Rochester FI
7017360
327
1962
Rochester FI
7017375
327
1963
Rochester FI
7017375R
327
1964
Rochester FI
7017380
327
64-65
Rochester FI
336789
454
74
Q-jet
Oval port
346242
454
75
Q-jet
Oval port
353015
454
73
Q-jet
Oval port
3732757
348
58-62
4-Brl
3749948
348
58-61
Three duce
3753748
348
60-61
Dual quad
Aluminum
3760436
348
58-59
4-Brl
3767579
348/409
61
4-Brl
3770084
348
58-59
4-Brl
3772265
348
60-61
4-Brl
3780540
348
58-59
4-Brl
Aluminum
3797775
348
59-60
4-Brl
3797776
409
61
4-Brl
3813678
409
62-63
4-Brl
3814881
409
62-64
Dual quad
Aluminum
3830623
409
63
Dual quad
Aluminum Z-11
3830831
409
63
4-Brl
340HP
3844463
409
64-65
4-Brl
400HP
3844464
409
64-65
4-Brl
340HP
3844472
348/409
62-65
4-Brl
3856289
396
65-66
Q-jet
Oval port L-35
3866948
396/427
66-67
Holley
Oval port L-34/L-35
3866963
396
65
Holley
Rectangular port Aluminum L-37
3883984
396/427
66-68
Q-jet
Oval port L-35/L-36
3885069
396/427
66-68
Holley
Rectangular port Aluminum L-78/L-72
3886093
427
67
Holley
Rectangular port Aluminum L-88
3894374
427
67
Three duce
Rectangular port Aluminum L-71
3894382
427
67
Three duce
Oval port Aluminum L-68
3919849
427
68
Q-jet
Oval port Aluminum L-36
3919850
427
68
Three duce
Oval port Aluminum L-68
3919852
427
68
Three duce
Rectangular port Aluminum L-71
3919878
396/427
68
Holley
Rectangular port Aluminum L-78/L-72
3931067
396/427
69
Q-jet
Oval port L-35/L-36
3933163
396/427
68-69
Holley
Rectangular port Aluminum L-78/L-89 COPO
3933198
427
68-69
Holley
Rectangular port Aluminum L-88/ZL-1
3937793
427
68
Q-jet
Oval port Aluminum L-36
3937795
427
69
Three duce
Oval port Aluminum L-68
3937797
427
69
Three duce
Rectangular port Aluminum L-71
393841
454
73-75
Q-jet
Oval port
3947801
427
69
Q-jet
Oval port Aluminum L-36
3952900
396
69
2-Brl
Oval port
3955287
402/454
70-71
Q-jet
Oval port LS-3/LS-5
3963569
396/402/454
70-71
Holley
Rectangular port Aluminum Low rise L-78/L-89/LS-6
3967474
454
71
Holley
Rectangular port Aluminum
6263753
402/454
72
Q-jet
Oval port LS-3/LS-5
6269318
454
72
Holley
Rectangular port Aluminum