1967 Chevy II

Code	Displ. & Carb.	Comp. Ratio
OA, OC, OH	153" 4 1 Bbl.	8.5:1
OK, OM, ZY, OR, ZX	194" 6 1 Bbl.	8.5:1
PV, PC, PX, PI	250" 6 1 Bbl.	8.5:1
PD, PF, PM, PE, PQ, PL, PN, PP, PU	283" V8 2 Bbl.	9.25:1
ZB, ZD, ZE, ZK	327" V8 2 Bbl.	9.0:1
ZA, SM	327" V8 4 Bbl.	10.5:1
ZG, ZI, ZJ	327" V8 4 Bbl.	11.0:1