Tempest & GTO Engines
| Code & Trans. Type | Disp. & Carb. | Comp. Ratio |
|---|---|---|
| ZC, ZK Synchro-mesh | 250" 6 1 Bbl. | 9.0:1 |
| ZF, ZN Auto. | 250" 6 1 Bbl. | 9.0:1 |
| ZH, ZD Synchro-mesh | 250" 6 4 Bbl. | 10.5:1 |
| ZL, ZE Auto. | 250" 6 4 Bbl. | 10.5:1 |
| XS, XR Auto. | 350" V8 2 Bbl. | 9.2:1 |
| YU, YN Auto. | 350" V8 2 Bbl. | 9.2:1 |
| WU, WP Synchro-mesh | 350" V8 2 Bbl. | 9.2:1 |
| XU Auto. | 350" V8 4 Bbl. | 10.5:1 |
| WV Synchro-mesh | 350" V8 4 Bbl. | 10.5-1 |
| YS Auto. | 400" V8 4 Bbl. | 10.75:1 |
| WT Synchro-mesh | 400" V8 4 Bbl. | 10.75:1 |
| YZ Auto. | 400" V8 4 Bbl. | 10.75:1 |
| WS Synchro-mesh | 400" V8 4 Bbl. | 10.75:1 |
| XX, XM Auto. | 400" V8 2 Bbl. | 8.6:1 |
| XP Auto. | 400" V8 4 Bbl. | 10.75:1 |
| WW Synchro-mesh | 400" V8 4 Bbl. | 10.75:1 |
| Code & Trans. Type | Displ. & Carb. | Comp. Ratio |
|---|---|---|
| ZB Synchro-mesh | 250" 6 1-Bbl. | 8.5:1 |
| ZG Auto. Trans. | 250" 6 1-Bbl. | 8.5:1 |
| WU Synchro-mesh | 350" V8 2-Bbl. | 8.8:1 |
| YU Auto. Trans. | 350" V8 2-Bbl. | 8.8:1 |
| WS, WW Synchro-mesh | 400" V8 4-Bbl. | 10.5:1 |
| WT Synchro-mesh | 400" V8 4-Bbl. | 10.25:1 |
| XX Auto. Trans. | 400" V8 2-Bbl. | 8.8:1 |
| XV, YS Auto. Trans. | 400" V8 4-Bbl. | 10.0:1 |
| XP, YZ Auto. Trans. | 400" V8 4-Bbl. | 10.5:1 |
| WA Synchro-mesh | 455" V8 4-Bbl. | 10.25:1 |
| YA Auto. Trans. | 455" V8 4-Bbl. | 10.25:1 |