| Code | Application | Displacement | Compression | Horsepower | Transmission | Heads | Camshaft | Carb |
| W7 | 350 | 8.8:1 | 255 | Manual | 11 | 254 | 2 bbl | |
| WA |  |
455 | 10.25:1 | 360 | Manual | 64 | 68 | 4 bbl |
| WE | FullSize | 400 | 10:1 | 290 | Manual | 16 | 66 | 2 bbl |
| WG | FullSize 4 Bolt | 455 | 10.25:1 | 370 | Manual | 64 | 68 | 4 bbl |
| WS | |
400 | 10.5:1 | 366 | Manual | 12 (Ram Air III) | 68 | 4 bbl |
| WS |  |
400 | 10.5:1 | 345 | Manual | 12 (Ram Air III) | 68 | 4 bbl |
| WT | |
400 | 10.25:1 | 350 | Manual | 12 | 67 | 4 bbl |
| WT | |
400 | 10.25:1 | 330 | Manual | 12 | 67 | 4 bbl |
| WU | 350 | 8.8:1 | 255 | Manual | 11 | 254 | 2 bbl | |
| WW | |
400 | 10.5:1 | 370 | Manual | 614 (Ram Air IV) | 41 | 4 bbl |
| WX | FullSize | 400 | 10.25:1 | 350 | Manual | 13 | 67 | 4 bbl |
| X7 | 350 | 8.8:1 | 255 | Auto | 11 | 254 | 2 bbl | |
| XF | FullSize 4 Bolt | 455 | 10.25:1 | 370 | Auto | 64 | 67 | 4 bbl |
| XH | FullSize | 400 | 10.25:1 | 350 | Auto | 13 | 66 | 4 bbl |
| XP | |
400 | 10.5:1 | 370 | Auto | 614 (Ram Air IV) | 41 | 4 bbl |
| XV | 400 | 10:1 | 330 | Auto | 16 | 66 | 4 bbl | |
| XX | |
400 | 8.8:1 | 265 | Auto | 11 | 254 | 2 bbl |
| XZ | FullSize | 400 | 10:1 | 330 | Auto | 16 | 66 | 4 bbl |
| YA |
4 Bolt |
455 | 10.25:1 | 360 | Auto | 64 | 67 | 4 bbl |
| YB | FullSize | 400 | 8.8:1 | 265 | Auto | 11 | 254 | 2 bbl |
| YC |
4 Bolt |
455 | 10.25:1 | 360 | Auto | 64 | 67 | 4 bbl |
| YD | FullSize | 400 | 10:1 | 290 | Auto | 16 | 254 | 2 bbl |
| YH | FullSize | 455 | 10:1 | 360 | Auto | 15 | 67 | 4 bbl |
| YS |
Ram Air III |
400 | 10:1 | 330 | Auto | 13 | 67 | 4 bbl |
| YU | 350 | 8.8:1 | 255 | Auto | 11 | 254 | 2 bbl | |
| YZ |
Ram Air IV |
400 | 10.5:1 | 366 | Auto | 12 (Ram Air III) | 68 | 4 bbl |
| YZ |
Ram Air IV |
400 | 10.5:1 | 345 | Auto | 12-13 (Ram Air III) | 68 | 4 bbl |
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