DOAE 4v heads

EV,

A D0AE head with large ports should be a 1970 "closed chamber" head. Something is amiss, the head should not have open chambers, if it has large 4V ports. So lets start with the basics. Look at the picture below. The head should have a number cast into the 2 corners on the intake manifold side of the head. What number is cast at that location on the cylinder heads you purchased? (where the yellow arrow is pointing)

There is a D0AE head with open chambers, but it has small 2V ports.

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)

The number is 4

When i look for the castings in Tom Monroes book I found that there where no heads with this combo. DOAE with big ports/valves is closed chamber.

Here is a pic. of the heads. DOAE to the left - some 2v heads to the right. I will take som better pic. later.

More pic..
#1

#2

The mystery is solved...

This is a 351c 4V closed chamber head.. or was

A former owner had 351 Boss pistons in the engine. In combination with the 351 closed chamber heads the comp.ratio become too high( >12:1???). It seems that the former owner modify the heads to OC style heads by grinding the chambers(black area in the chambers- see pic). This resulted in chambersize something in the middele of closed chamber and open chamber. Only a proper CC mesurement will give the answer.

Do U want to sell these heads ?
thx Mike

These heads are going to be used on #6287.

Ok & thx if U decide there not going on 6287-let me know
Mike