1968 CHEVROLET
| Code | Displ. & Carb. | Comp. Ratio |
|---|---|---|
| CA, CB, CC, CJ, CK, CL, CM, CN, CO, CR, CS, CT | 250" 6 1 Bbl. | 8.5:1 |
| DO, DP, DS, DQ, DR | 307" V8 2 Bbl. | 9.0:1 |
| HA, HB, HC, HF | 327" V8 2 Bbl. | 10.0:1 |
| HI, HJ, HL, HM | 327" V8 4 Bbl. | 10.0:1 |
| IA, IG, IV, IK, IN, IF | 396" V8 4 Bbl. | 10.25:1 |
| IE, IH, IJ, IS, IC | 427" V8 4 Bbl. | 10.25:1 |
| ID | 427" V8 3-2 Bbl. | 11.0:1 |