Topic: 302 and 351W heads

[timsweet]

will 351W heads from a 70 Mustang go on a 302 block?

[Soaring]

Basically the same animal.  351W heads have larger valves and a bigger combustion chamber..and they will flow much better..but you sacrifice compression as the bigger chambers will drop compression..a 302 intake as well as exhaust manifolds will bolt right up..the 351 heads are exactly the same size except for the valves and chambers.

[Jeff73Mach1]

Been a while since I messed with windsors, but IIRC the 351 heads use larger head bolts and you have to use a specific headbolt that is stepped for the swap.  Otherwise they are interchangeable.

[thundertc64]

If you want to use 351 heads you need to lok for these casting numbers C90E-B, C90E-D, D0OE-C, D0OE-G, D0OZ-C    these heads have the smaller cc chambers and will not drop compression and flow pretty good for stock heads. Since they are from a 70 mustang they are probably the ones you need, but check numbers to be sure