1966 CHEVROLET
| Code | Displ. & Carb. | Comp. Ratio |
|---|---|---|
| FA, FE, FF, FV, FK, FL, FP, FR, FY, FZ, GP, GQ, GR | 250" 6 1 Bbl. | 8.5:1 |
| GA, GC, GK, GS, GF, GT | 283" V8 2 Bbl. | 9.25:1 |
| GW, GX, GL, GZ | 283" V8 4 Bbl. | 9.25:1 |
| HA, HB, IC, HF | 327" V8 4 Bbl. | 10.5:1 |
| IA, IB, IG, IV, IC, IN | 396" V8 4 Bbl. | 10.5:1 |
| IH, IJ, II | 427" V8 4 Bbl. | 10.5:1 |
| ID, IO | 427" V8 4 Bbl. | 11.0:1 |