Guess I'm going to start collecting parts to attempt to touch 80 (75-76 currently) next year so more aggressive parts are needed. I'm starting off with basically stock 502 efi's. I have Gil exhaust and "tuned ecms". No clue how they are tuned since AS&M was unable to help. So I guess I'm in the market for
500hp intakes
500HP cams
Ecu's, if I stay efi
Possible heads if the stockers can't be easily modified
And valve springs...

Anything else I'm missing? Thanks

I'm assuming you have 502 mags. If you do; work with that setup, those intakes actually flow better than the 500 efi's w/ very little machining, heads, cam, comp. program 550-600hp

+1 or try and find 525 stuff..better cam,,you can also just buy some edelbrock 110 cc chamber heads to boot..