| Code | Application | Displacement | Compression | Horsepower | Transmission | Heads | Camshaft | Carb |
| WT | 400 | 7.6:1 | 185 | Manual | 6X | 67 | 4 bbl | |
| WX | 455 | 7.6:1 | 200 | Manual | 6H | 67 | 4 bbl | |
| X4 | 400 | 7.6:1 | 170 | Auto | 6X | 255 | 2 bbl | |
| XP | 350 | 7.6:1 | 160 | Auto | 6X | 254 | 2 bbl | |
| XZ | 350 | 7.6:1 | 165 | Auto | 6X | 555 | 4 bbl | |
| Y3 | 455 | 7.6:1 | 200 | Auto | 6H | 67 | 4 bbl | |
| Y4 | 455 | 7.6:1 | 200 | Auto | 6H | 67 | 4 bbl | |
| Y6 | 400 | 7.6:1 | 185 | Auto | 6X | 66 | 4 bbl | |
| Y7 | 400 | 7.6:1 | 185 | Auto | 6X | 66 | 4 bbl | |
| Y8 | 455 | 7.6:1 | 200 | Auto | 6H | 67 | 4 bbl | |
| YA | 350 | 7.6:1 | 160 | Auto | 6X | 254 | 2 bbl | |
| YB | 350 | 7.6:1 | 160 | Auto | 6X | 254 | 2 bbl | |
| YC | 400 | 7.6:1 | 170 | Auto | 6X | 255 | 2 bbl | |
| YJ | 400 | 7.6:1 | 170 | Auto | 6X | 255 | 2 bbl | |
| YP | 350 | 7.6:1 | 160 | Auto | 6X | 254 | 2 bbl | |
| YR | 350 | 7.6:1 | 160 | Auto | 6X | 254 | 2 bbl | |
| YS | 400 | 7.6:1 | 185 | Auto | 6X | 66 | 4 bbl | |
| YT | 400 | 7.6:1 | 185 | Auto | 6X | 66 | 4 bbl | |
| YY | 400 | 7.6:1 | 185 | Auto | 6X | 66 | 4 bbl | |
| YZ | 400 | 7.6:1 | 185 | Auto | 6X | 66 | 4 bbl | |
| Z3 | 455 | 7.6:1 | 200 | Auto | 6S | 67 | 4 bbl | |
| Z4 | 455 | 7.6:1 | 200 | Auto | 6S | 67 | 4 bbl | |
| ZA | 400 | 7.6:1 | 185 | Auto | 6S | 66 | 4 bbl | |
| ZB | 455 | 7.6:1 | 200 | Auto | 6S | 67 | 4 bbl | |
| ZF | 350 | 7.6:1 | 165 | Auto | 6X | 555 | 4 bbl | |
| ZK | 400 | 7.6:1 | 185 | Auto | 6X | 66 | 4 bbl |
 |