Ford offered around fifty different combinations of FE heads and intake manifolds. Anymore, I think in terms of 'SETS of heads and the intake manifold' because most combinations won't work. Then there are aftermarket...

FE engines were great back in the day but now they are forced to run unleaded gasohol and oil with no ZDDP. The result is, cast iron cannot get rid of the heat fast enough. Consequently, most FE users have sacrificed gas mileage and HP in favor of a cooler running engine.

Yes, you can run 11:1 compression ratio but you better do some fancy footwork to get it right. The only way I see to modernize these engines for daily cruising is to go with aluminum and eliminate the exhaust crossover and heat riser valve. A hydraulic roller cam will allow you to use modern oil.

Edelbrock makes aluminum FE heads but they only fit 390 and 427 because they repositioned the 2.02" valves closer to the cylinder walls. These heads are top shelf with bronze guides, stainless valves, hardened seats (all of them), pushrod guides, new springs, keepers, etc., and the holes are helicoiled. Did I mention CNC? Yep, every head is identical. Now the cost doesn't sound so bad considering aluminum transfers heat four times faster than iron and they're light.

None of this comes cheap. Edelbrock heads run around $750/each. Y-Block aluminum heads cost twice as much from John Mummert, and that engine is barely 300 cubes.

sorry it took so long for me to reply. more info is the C3AE-6090-C. I believe they are a "medium" riser head, with the smallest combustion chamber on a FE head, so I will have to "gasket match" any intake to it. No big deal.

I think I am going to pull the trigger on these as a way to boost a big more power out a 352. Give me a reason to clean up the block a bit as well, and install a mild cam and fresh chain in the process.

if you got any advise on this it would be great appreciated.

To the best of my knowledge the C3AE-6090-C heads were used after the end of run of the 63 Tri-Power set-ups in around February 63 as a common head on the 63 thunderbird 390 engine boosting it's compression ratio from a 9.5 to 1 to a 10.5 to 1 and 300 hp . They are quite common the Tri-Powers used C2SE-6090-A and 6090-B with some of the 6090C series findings it's way on the late production M Tri-Powers in the early month's of 1963 , these of co**** being 406 heads .Ian m Greer (REMEMBER NOT ALL BIRDS FLY SOUTH)