Home Mortec Forum

Chevy V8 Crankshaft Casting Numbers

Here's a list of Chevy V-8 crankshaft casting numbers. Make sure your crank will work in the block you have. Blocks were made for each crank main journal size. If you are putting a "medium" journal crank from a 350 into a 400 SBC block you can use "spacers" or "thick" main bearings. Cranks also use either a two piece rear main oil seal or a one piece rear main oil seal. Rear oil seal adaptors are available from Chevy or aftermarket suppliers, if you are trying to put a crank designed for a two piece seal into a block made for a one piece seal.


Chevy Smallblock V8 Crankshaft Casting Numbers

SBC Two-Piece Rear Main Oil Seals

1130.......327.......forged..medium journal...3.25" stroke
1178.......302.......forged..medium journal...3.00" stroke
1181.......305,350...cast....medium journal...3.48" stroke
1182.......350.......forged..medium journal...3.48" stroke
2680.......327.......forged..small journal....3.25" stroke
2690.......350.......forged..medium journal...3.48" stroke
3279.......302.......forged..medium journal...3.00" stroke
3474.......283.......forged..small journal....3.00" stroke, military tank use
4577.......327.......forged..small journal....3.25" stroke
4672.......327.......forged..medium journal...3.25" stroke
310514.....350.......cast....medium journal...3.48" stroke
330550.....350.......cast....medium journal...3.48" stroke
354431.....262.......cast....medium journal...3.10" stroke
3727449....283.......forged..small journal....3.00" stroke
3729449....265.......forged..small journal....3.00" stroke
3734627....327.......forged..small journal....3.25" stroke
3735236....265,283...forged..small journal....3.00" stroke
3735263....283.......forged..small journal....3.00" stroke
3782680....327.......forged..small journal....3.25" stroke
3814671....327.......forged..small journal....3.25" stroke
3815822..265,283,302.forged..small journal....3.00" stroke
3835236....283.......forged..small journal....3.00" stroke
3836266....283.......forged..small journal....3.00" stroke
3848847....283.forged or cast..sm. journal....3.00" stroke
3849847....283.......forged..small journal....3.00" stroke
3876764....283.forged or cast..sm. journal....3.00" stroke
3876768....283.......forged..small journal....3.00" stroke
3884577....327.......forged..small journal....3.25" stroke
3892690....350.......forged..medium journal...3.48" stroke
3911001....307,327...cast....medium journal...3.25" stroke
3911011....307,327...cast....medium journal...3.25" stroke
3914672....327.......forged..medium journal...3.25" stroke
3923279....302.......forged..medium journal...3.00" stroke
3932442..267,305,350..cast...medium journal...3.48" stroke
3941174....307,327...cast....medium journal...3.25" stroke
3941178....302.......forged..medium journal...3.00" stroke
3941182....350.......forged..medium journal...3.48" stroke
3941188....350.......forged..medium journal...3.48" stroke
3949847....283..forged or cast..sm. journal...3.00" stroke
3951130....327.......forged..medium journal...3.25" stroke
3951529....400.......cast....large journal....3.75" stroke

SBC One-Piece Rear Main Oil Seal

10168568...265.......cast....medium journal...3.00" stroke
12552215...364.......cast....medium journal...3.62" stroke, Gen. III, 6.0L
12552216...325,350,364.......cast....medium journal...3.62" stroke, Gen. III 5.7L LS1, 5.3L, 6.0L
12553312...293.......cast....medium journal, 3.27" stroke, Gen. III, 4.8L
12553482...293.......cast....medium journal, 3.27" stroke, Gen. III, 4.8L
14088526...305,350...cast....medium journal...3.48" stroke
14088532...350.......forged..medium journal...3.48" stroke
14088535...305,350...cast....medium journal...3.48" stroke
14088552...350.......forged..medium journal...3.48" stroke

ZR1, "LT5", 350 DOHC

10106122...350.......forged..large 2.76" journal...3.66" stroke



Chevy Big-Block V8 Crankshaft Casting Numbers


BBC Two-Piece Rear Main Oil Seals
3.76" STROKE (used on '65-'90 Mark IV 366T, 396, 402, 427 or 427T)

6223.......396,402,427...forged, 1053 steel
7115.......396,402,427...forged, nitrided, cross-drilled, 5140 steel
3804816....396,402,427...cast
3856223....396...forged
3863114....402...
3863144....396,402...
3874874....396,402...
3879621....427...forged
3882841....396...forged, cross drilled, nitrided
3882842....427...forged, cross drilled, nitrided
3882847....
3882848....
3882849....427...forged
3887114....396...forged, nitrided, 5140 steel
3904815....396,402...cast, nodular iron
3941180....
3942411....
3965746..........semi finished, forged
3993804..........raw, 5140 steel

BBC One-Piece Rear Main Oil Seal
3.76" STROKE (used on '91-up Gen.V and Gen. VI 366T, 427T)

10114186...427T...forged, 1053 steel 10114187...366T...cast 10114189...427T...cast Two-Piece Rear Main Oil Seals 4.00" Stroke (used on '70-90 Mark IV 454 or Mark IV 502)
3520.......454...forged, cross-drilled, 1053 steel 3521.......454, 502...forged, cross-drilled, 5140 steel 3524.......454...forged 7416.......454, 502...forged, cross-drilled, 1053 steel 7463.......454...forged 336782.....454...cast 353039.....454...cast 353638.....454... 359730.....454... 3962523....454...forged 3963523....454... 3963524....454...forged 3967416....454...forged 3967463....454...forged 3975945....454 3963521....454...forged, cross drilled, 5140 steel 3965753..........semi finished, forged, 5140 steel 3975495....454 3993878....454...forged 10051169...454...forged raw casting One-Piece Rear Main Oil Seal 4.00" Stroke (used on '91-up Gen.V and VI 454 or 502)
10114188...454......cast 14097044...454,502..forged, 1053 steel
Chevy 348-409 "W" MOTOR V-8 Crankshaft Casting Numbers
3732692...348...forged...3.25" stroke 3733223...348...forged...3.25" stroke 3733226...348...forged...3.25" stroke 3741640...348...forged...3.25" stroke 3741642...348...forged...3.25" stroke 3788072...409...forged...3.50" stroke 3795589...409...forged...3.50" stroke 3824553...348...forged...3.25" stroke 3829027...409...forged...3.50" stroke 3837466...409,427 "Z11"...forged...3.65" stroke 3838416...409...forged...3.50" stroke


Don't forget to bookmark this page or add it to favorites. We appreciate the support and encouragement we have received from our visitors around the world. If you are running a website, please link to us. And if you find our site helpful, please click the g+1 button below to recommend us to Google!



V-8 CRATE MOTORS FOR SALE
HOLLEY CARB INFORMATION
HOLLEY TUNING TIPS
CHEVY V-8 CASTING NUMBER LOCATIONS
CHEVY V-8 BORE AND STROKE LIST
CHEVY V-8 CASTING NUMBERS
CHEVY V-8 CRANKSHAFT JOURNAL SIZES
CHEVY V-8 NOTES
HOT LINKS

Got a question about cars? Ask in the forum!

© Copyright 1998-2013 Mortec. No portion of this website may be copied or reproduced without permission.  Privacy Policy