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05-13-2024, 08:28 PM
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