1978 318 heads? Small port? Or large

Thanks for all the debate and knowledge guys. I would gather that no matter if and when the 318's did or did not have 360heads......my smog 1978 with a 2 bbl has small heads. Just didnt want to buy a 1k efi system to set it on top of an edelbrock performer with the goofy uni-flange. Anything made for the 360 woukd be a pretty big port mismatch I imagine. Maybe I will yank it altogether, maybe I will look for a weiand. We'll see. Thanks again