Chevy Crankshaft Casting Numbers
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Chevy V-8 Small and Big Block Crankshaft Casting Numbers and Data
There is a lot of misinformation on the internet about these numbers. We have taken the time to verify the data as much as possible. There still may be errors. Please lets us know if you find one.
Small Blocks - Two Piece Main Seal
| Number | C.I.D. | Type | Journal | Stroke | Description |
|---|---|---|---|---|---|
| 1130 | 327 | Forged | Medium | 3.25 | |
| 1178 | 302 | Forged | Medium | 3.00 | |
| 1181 | 305/350 | Cast | Medium | 3.48 | |
| 1182 | 350 | Forged | Medium | 3.48 | |
| 2680 | 327 | Forged | Small | 3.25 | |
| 2690 | 350 | Forged | Medium | 3.48 | |
| 3279 | 302 | Forged | Medium | 3.00 | |
| 3474 | 283 | Forged | Small | 3.00 | Military Tank |
| 4577 | 327 | Forged | Small | 3.25 | |
| 4672 | 327 | Forged | Medium | 3.25 | |
| 310514 | 350 | Cast | Medium | 3.48 | |
| 330550 | 350 | Cast | Medium | 3.48 | |
| 354431 | 262 | Cast | Medium | 3.10 | |
| 3727449 | 283 | Forged | Small | 3.00 | |
| 3729449 | 265 | Forged | Small | 3.00 | |
| 3734627 | 327 | Forged | Small | 3.25 | |
| 3735236 | 265,283 | Forged | Small | 3.00 | |
| 3735263 | 283 | Forged | Small | 3.00 | |
| 3782680 | 327 | Forged | Small | 3.25 | |
| 3814671 | 327 | Forged | Small | 3.25 | |
| 3815822 | 265,283,302 | Forged | Small | 3.00 | |
| 3835236 | 283 | Forged | Small | 3.00 | |
| 3836266 | 283 | Forged | Small | 3.00 | |
| 3848847 | 283 | Forged,Cast | Small | 3.00 | |
| 3849847 | 283 | Forged | Small | 3.00 | |
| 3876764 | 283 | Forged,Cast | Small | 3.00 | |
| 3876768 | 283 | Forged | Small | 3.00 | |
| 3884577 | 327 | Forged | Small | 3.25 | |
| 3892690 | 350 | Forged | Medium | 3.48 | |
| 3911001 | 307,327 | Cast | Medium | 3.25 | |
| 3911011 | 307,327 | Cast | Medium | 3.25 | |
| 3914672 | 327 | Forged | Medium | 3.25 | |
| 3923279 | 302 | Forged | Medium | 3.00 | |
| 3932442 | 267,305,350 | Cast | Medium | 3.48 | |
| 3941174 | 307,327 | Cast | Medium | 3.25 | |
| 3941178 | 302 | Forged | Medium | 3.00 | |
| 3941182 | 350 | Forged | Medium | 3.48 | |
| 3941188 | 350 | Forged | Medium | 3.48 | |
| 3949847 | 283 | Forged,Cast | Small | 3.00 | |
| 3951130 | 327 | Forged | Medium | 3.25 | |
| 3951529 | 400 | Cast | Large | 3.75 |