Join Date: Dec 2015
Location: Ford Motor Company - Dearborn
The heads in question I believe have the stock valve sizes. He told me the heads were probably from a 1993 Ford Lightning. The springs, bushings, valves, hardened seats, etc.... are all new. No additional porting was done. I asked him what cam would be a good fit and he explained the way they determine what cam to use is by mounting the heads on a machine they have that measures the amount of air flow through the heads, that way they can tell what actually produces the best flow, which they'll do. He also said with the springs that were currently on them it would be right around a 500 lift. He also cross referenced some pistons and said I would be at 9.5 to 1 using a forged flat top piston using those heads as is. Also I know the ones in question are not the GT40P just because he made note of that. Also, I know my current 1968 302 4V heads have smaller valves but they have 10.5 to 1 compression ratio.
I think I will keep the original heads as is and store them for the next owner. The car is a nice clean original numbers matching car so I don't want to make any changes that can't be undone.
Last edited by lennyB; 02-02-2018 at 09:39 PM.