1964 GTO
Engine Codes
| Std.Code | CID | Carb | Trans | CR | HP |
| 76X | 389 | 3x2 | 3-Spd | 10.75:1 | 348 |
| 76W | 389 | 3x2 | 4-Spd | 10.75:1 | 348 |
| 76XW | 389 | 3x2 | 4-Spd (M20) | 10.75:1 | 348 |
| 769 | 389 | 3x2 | 4-Spd (M21) | 10.75:1 | 348 |
| 77J | 389 | 3x2 | Auto | 10.75:1 | 348 |
| 78X | 389 | 4bbl | 3-Spd | 10.75:1 | 325 |
| 78W | 389 | 4bbl | 4-Spd (M20) | 10.75:1 | 325 |
| 78XW | 389 | 4bbl | 4-Spd (M20) | 10.75:1 | 325 |
| 789 | 389 | 4bbl | 4-Spd (M21) | 10.75:1 | 325 |
| 79J | 389 | 4bbl | Auto | 10.75:1 | 325 |
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