06-05-09, 06:53 PM
D = 250 c.i.d, 1-bbl V6 (1972 - 76)
M = 350 c.i.d, 2-bbl V8 (single exhaust) (1972 - 76)
P = 350 c.i.d, 4-bbl V8 (1976)
W = 455 c.i.d, 4-bbl V8 (1975 -76)
Z = 400 c.i.d, 4-bbl V8 (1976 - 79)
Engine code
1976
Pontiac 400: Y9, YS, YZ, ZK, Y9 (automatic) WU, WT (manual)
Pontiac 455: WX
M = 350 c.i.d, 2-bbl V8 (single exhaust) (1972 - 76)
P = 350 c.i.d, 4-bbl V8 (1976)
W = 455 c.i.d, 4-bbl V8 (1975 -76)
Z = 400 c.i.d, 4-bbl V8 (1976 - 79)
Engine code
1976
Pontiac 400: Y9, YS, YZ, ZK, Y9 (automatic) WU, WT (manual)
Pontiac 455: WX