Engine Identification
Sixth digit on car identification plate located on top of instrument panel on left side visible through windshield identifies model year. Engine number is stamped on front of block below right cylinder head. See " Model Identification " for further data .
Engine Code Letters
| Tempest | Synchro-mesh | Auto. Trans. | ||
|---|---|---|---|---|
| 350" 2-Bbl. | WU, WP | XS, YU, XR, YN | ||
| 4-Bbl. | WV | XU | ||
| 400" 2-Bbl. | XX, XM | |||
| 4-Bbl. 350 HP | WT | YS | ||
| 366 HP | WS | YZ | ||
| 370 HP | WW | XP | ||
| Firebird | ||||
| 350" 2-Bbl. | WM | XB, YE | ||
| 4-Bbl. | WN | XC | ||
| 400" 4-Bbl. 330 HP | WZ | YT | ||
| 335 HP | WQ, WH | YM, XN | ||
| 345 HP | WH | XN | ||
| Pontiac | ||||
| 400" 2-Bbl. 265 HP | YB, YF | |||
| 290 HP | WD, WE | YD | ||
| 4-Bbl. 340 HP | XZ | |||
| 350 HP | WX | XH | ||
| 428" 4-Bbl. 360 HP | WG | XJ, XK, YH | ||
| 370 HP | WF | XF | ||
| 390 HP | WL, WJ | XG, YK | ||