Edelbrock Pro Flo 4 EFI

jgchemie said
It will "fit" my stock heads but they state to use 360/340 heads because of the port size, I think.

It will definitely fit 318 heads. The port size on the intake out of the box really needs about 1/8-1/4 inch shaved off to be a proper gasket match with a 360/340 aluminum head.