PONTIAC & Grand PRIX Engines
| Code & Trans. Type |
Disp. & Carb. |
Comp. Ratio |
| WD, WA Synchro-mesh |
400" V8 2 Bbl. |
10.5:1 |
| YB, YA Auto. |
400" V8 2 Bbl. |
8.6:1 |
| WE, WB Synchro-mesh |
400" V8 2 Bbl. |
10.5:1 |
| YD, YC Auto. |
400" V8 2 Bbl. |
10.5:1 |
| WG Synchro-mesh |
428" V8 4 Bbl. |
10.5:1 |
| YH, YL Auto. |
428" V8 4 Bbl. |
10.5:1 |
| WJ Synchro-mesh |
428" V8 4 Bbl. |
10.75:1 |
| XK Auto. |
428" V8 4 Bbl. |
10.5:1 |
| XJ, XE Auto. |
428" V8 4 Bbl. |
10.5:1 |
| YK Auto. |
428" V8 4 Bbl. |
10.75:1 |
| WX Synchro-mesh |
400" V8 4 Bbl. |
10.5:1 |
| XH Auto. |
400" V8 4 Bbl. |
10.5:1 |
| WF Synchro-mesh |
428" V8 4 Bbl. |
10.5:1 |
| XF Auto. |
428" V8 4 Bbl. |
10.5:1 |
| WL Synchro-mesh |
428" V8 4 Bbl. |
10.75:1 |
| XG Auto. |
428" V8 4 Bbl. |
10.75:1 |
| YF Auto. |
400" V8 2 Bbl. |
8.6:1 |
| X2 Auto. |
400" V8 4 Bbl. |
10.5:1 |
Courtesy of GENERAL MOTORS COMPANY
| Code & Trans. Type |
Displ. & Carb. |
Comp. Ratio |
| W7 Synchro-mesh |
350" V8 2-Bbl. |
8.8:1 |
| X7 Auto. Trans. |
350" V8 2-Bbl. |
8.8:1 |
| WE Synchro-mesh |
400" V8 2-Bbl. |
10.0:1 |
| WX Synchro-mesh |
400" V8 4-Bbl. |
10.25:1 |
| XH Auto. Trans. |
400" V8 4-Bbl. |
10.25:1 |
| XZ Auto. Trans. |
400" V8 4-Bbl. |
10.0:1 |
| YB Auto. Trans. |
400" V8 2-Bbl. |
8.8:1 |
| YD Auto. Trans. |
400" V8 2-Bbl. |
10.0:1 |
| WG Synchro-mesh |
455" V8 4-Bbl. |
10.25:1 |
| XF Auto. Trans. |
455" V8 4-Bbl. |
10.25:1 |
| YH Auto. Trans. |
455" V8 4-Bbl. |
10.0:1 |