Depends on the level of porting, AKA, how large the port cross sectional area is. Even then, you would build to suite and IMO a ported Edelbrock or a OOTB TF head would be fine on a 318. At least with some type of a street cred build. Even a mild-ish cam would be fine. I just don’t really see the point of a high flow head wi a low lift cam.