I have a 75 Tall deck 454 that I am having some issues with. Its my brothers old truck which I believe is the 346236 casting. It has large oval port heads which I have no idea if they flow worth anything or not. I just put a Summit racing SUM-K1301 cam in it.

Specs: duration 218/228 and the lift is .500/.500 with a lobe separation of 114.

Motor seems to run fine so here is my issue. When removing the old ugly Edelbrock iron intake that was on it, I found that it had SMALL rectangle ports instead of the large oval ports. I mean these ports look smaller than a SBC intake. I don't know if the intake is for a 366 or what.

I am sure the intake would be hampering the air flow into the motor as the intake gasket for the oval port heads easily encompassed the little rectangle ports. I have had some where between little and no success in finding an intake for the large oval ports and the tall deck. The oval port intake for tall deck that edelbrock sells is considerably smaller than the ports on these heads.

When I finally get an edelbrock intake with the correct sized ports its for a short deck and not the tall deck. I know Weiand has an adapter for tall decks but I HATE adapters and that will add more money to an expensive intake and I am back to are these heads any good or what? Any help would be appreciated.