Reply to "DOAE 4v heads"

351C Cylinder Head Casting Numbers
for cylinder heads manufactured in the US

1970 351C 2V (H code): D0AE (small ports, small valves, open combustion chambers, 76 cc)

1971 - 1974 351C 2V (H code): D1AE (small ports, small valves, open combustion chambers, 78.4 cc)

1970 351C 4V (M code): D0AE (large ports, large valves, closed combustion chambers, 62.8cc)

1971 351C 4V (M code): D1AE (large ports, large valves, closed combustion chambers, 66.1cc)

1971 351 Boss (R code): D1AE (large ports, large valves, closed combustion chamber, 66.1cc, machined for adjustable valve train)

1972 351 HO (R code): D1ZE (large ports, large valves, open combustion chambers, 75.4cc, machined for adjustable valve train)

1971 351 Cobra Jet (Q code): D1ZE (large ports, large valves, open combustion chambers, 75.4cc)

1972 351 Cobra Jet (Q code): D1ZE (large ports, large valves, open combustion chambers, 75.4cc)

1973 - 1974 351C 4V (Q code): D3ZE (large ports, small valves, open combustion chambers, 78.4cc)