[FireSale]

For everyone's info, the "D-" at the end of a Ford casting number is a revision suffix. DA is the original head. When an engineering change is made to the part the last letter of the suffix is moved down the alphabet. DC heads have had two changes made to them. They may cc the same, but something has been changed. I think that when the suffix was changed, the factory published HP rating stayed the same. NHRA decided they could document the HP of the DA head but not the others and edited the guide to recognize only the DA as legal. Very difficult to build a 1977 Ford 302 stocker.


'77 Chevy 305/145 has three head castings listed
'68 Chevy 327/350 has seven.


I have a Root Beer in the 'fridge...