Serial Numbers
1Z67J5S400001 - 1Z67J5S438465
The third and fourth characters represent body style
67 is for Convertibles
37 is for Coupes
The fifth character represents the engine type
J is for the base L48 engine
T is for the optional L82 engine
Drivetrain
| Engine Type |
Compression Ratio |
Net Horsepower |
Net |
Transmission | Standard Axle |
Highway Axle |
High-Altitude/ Performance Axle |
| L48 | 8.5:1 | 165 | 255 | 4-speed manual Wide Ratio(2.64:1 low) |
3.36:1 | 3.08:1 | - |
| L48 | 8.5:1 | 165 | 255 | Turbo Hydra-Matic 400 | 3.08:1 | 2.73:1 | - |
| L82 | 9.0:1 | 205 | 255 | 4-speed manual Wide Ratio(2.64:1 low) |
3.55:1 | - | - |
| L82 | 9.0:1 | 205 | 255 | 4-speed manual Close Ratio(2.43:1 low) |
3.55:1 | - | 3.70:1 |
| L82 | 9.0:1 | 205 | 255 | Turbo Hydra-Matic 400 | 3.36:1 | - | 3.55:1 |
Engine Codes
| Engine Code |
R.P.O. | Cubic Inches |
Horsepower | Applicable Equipment |
| CHA | L48 | 350 | 165 | 4-speed (Federal) |
| CHB | L48 | 350 | 165 | Turbo Hydra-Matic 400 (Federal) |
| CHU | L48 | 350 | 165 | 4-speed (Federal) |
| CHZ | L48 | 350 | 165 | Turbo Hydra-Matic 400 (California) |
| CRJ | L48 | 350 | 165 | 4-speed (Federal) |
| CRK | L48 | 350 | 165 | Turbo Hydra-Matic 400 (Federal) |
| CUA | L48 | 350 | 165 | 4-speed (Federal) |
| CUB | L48 | 350 | 165 | 4-speed (Federal) |
| CHC | L82 | 350 | 205 | 4-speed (Federal) |
| CHR | L82 | 350 | 205 | Turbo Hydra-Matic 400 (Federal & California) |
| CKC | L82 | 350 | 205 | Turbo Hydra-Matic 400 (Federal) |
| CRL | L82 | 350 | 205 | 4-speed (Federal) |
| CRM | L82 | 350 | 205 | Turbo Hydra-Matic 400 (Federal) |
| CUD | L82 | 350 | 205 | 4-speed (Federal) |
| CUT | L82 | 350 | 205 | 4-speed (Federal) |
Axle Ratio and Code
| Code | Ratio |
| AA | 3.55:1 |
| AB | 3.70:1 |
| AC | 4.11:1 |
| AY | 2.73:1 |
| AW | 3.08:1 |
| AX | 3.36:1 |
| LR | 3.36:1 |
Transmission Identification Codes
| Transmission | Code |
| Warner 4-speed, Heavy Duty Aluminum Case | W |
| Turbo Hydra-Matic 400 with L48 | CK |
| Turbo Hydra-Matic 400 with L82 | CZ |
Engine Block Casting Numbers
| 3970010 | All Applications |
Cylinder Head Casting Numbers
| 333882 | All Applications |
Intake Manifold Casting Numbers
| 346249 | All Applications |
Exhaust Manifold Casting Numbers
| 3932461 | All Applications |
Carburetor Numbers
| Engine | Transmission | Manufacturer | Model | Chevrolet # |
| L48 | Turbo Hydra-Matic | Rochester | M4MC | 7045210 |
| L48 | 4-speed | Rochester | M4MC | 7045211 |
| L82 | Turbo Hydra-Matic | Rochester | M4MC | 7045222 |
| L82 | 4-speed | Rochester | M4MC | 7045223 |
Distributor Numbers
| Distributor # | Application |
| 1112888 | L48 |
| 1112880 | L48 (California) |
| 1112883 | L82 first design |
| 1112979 | L82 second design |
Alternator Numbers
| Alternator # | Amp Rating | Application |
| 1100544 | 61 | With A/C (early) |
| 1100597 | 61 | With Heavy Duty Battery (early) |
| 1100950 | 42 | L48 & L82 (early) |
| 1102394 | 37 | L48 (late)(unverified) |
| 1102474 | 61 | With A/C (late) |
| 1102480 | 61 | With Heavy Duty Battery (late) |
| 1102483 | 37 | L48 (early)(unverified) |
| 1102484 | 42 | L82 (late) |
Starter Numbers
| Starter # | Application |
| 1108418 | 4-speed (early) |
| 1108430 | Turbo Hydra-Matic (early) |
| 1108775 | 4-speed (late) |
| 1108776 | Turbo Hydra-Matic (late) |
Wiper Motor Numbers
| 5044814 | All Applications |
Horn Numbers
| Low Note | High Note | Relay | |
| First Design | 9000049 | 9000038 | 344813 |
| Second Design | 9000033 | 9000106 | 344813 |