| Code | Application | Displacement | Compression | Horsepower | Transmission | Heads | Camshaft | Carb |
| WC |
HO 4 Bolt |
455 | 8.4:1 | 335 | Manual | 197 | 68 | 4 bbl |
| WG | FullSize | 455 | 8.1:1 | 280 | Manual | 98 | 66 | 4 bbl |
| WJ | FullSize | 455 | 8.1:1 | 325 | Manual | 66 | 67 | 4 bbl |
| WK |
Grand Prix |
400 | 8.1:1 | 300 | Manual | 96 | 67 | 4 bbl |
| WL |
HO 4 Bolt |
455 | 8.4:1 | 335 | Manual | 197 | 68 | 4 bbl |
| WR | 350 | 8:1 | 250 | Manual | 94 | 555 | 2 bbl | |
| WS | FullSize | 400 | 8.1:1 | 265 | Manual | 99 | 555 | 2 bbl |
| WT |
Grand Prix |
400 | 8.1:1 | 300 | Manual | 96 | 67 | 4 bbl |
| WU | 350 | 8:1 | 250 | Manual | 94 | 555 | 2 bbl | |
| XR | 350 | 8.1:1 | 250 | Auto | 94 | 555 | 2 bbl | |
| XX |
Grand Prix |
400 | 8.1:1 | 265 | Auto | 99 | 555 | 2 bbl |
| YA | 455 | 8.1:1 | 280 | Auto | 98 | 66 | 4 bbl | |
| YC |
FullSize |
455 | 8.1:1 | 325 | Auto | 66 | 67 | 4 bbl |
| YE |  |
455 | 8.4:1 | 335 | Auto | 197 | 68 | 4 bbl |
| YG | FullSize | 455 | 8.1:1 | 280 | Auto | 98 | 66 | 4 bbl |
| YS |
Grand Prix |
400 | 8.1:1 | 300 | Auto | 96 | 67 | 4 bbl |
| YU | 350 | 8:1 | 250 | Auto | 94 | 555 | 2 bbl |
 |
