Ford cast Iron heads casting #s

[PKRWUD]

You done good, Opie!

Those are 351W heads. Correction: those are the best 351W heads. They are pre 1978, which was the year the valves and the ports got smaller, while the combustion chambers got bigger. Specifically, your heads have:

60.4cc combustion chambers
1.84" intake valves
1.54" exhaust valves
1.94" x 1.76" intake ports
1.24" x 1.00" exhaust ports

Those are all among the best sizes Ford offered in stock form for the windsor package, minus of course the Boss engines.

The easiest way to tell the older, better 351W heads from the newer, crappier ones, is by the water jacket at the end of the head. Good heads water jacket opening is shaped like an upside down "L". Crappy heads water jacket opening looks like a regular rectangular port.

Take care,
-Chris