the heads may work?? i do not know what your trying to do how much HP? i think i told you on how i have done this? the intake will not work for hp use .it is junk for that it is good for a truck that is it . 2.19 intake and 188 valve would be ok but i would go to 2.250 /1.880 11/32 stems for big cid and hp. if you do a good bowl job to .if not then do not wast you money on big valves. you do know that you can not get 500 cid you of a 366