Building a mild 390, .30 over, headers, Comp 270 cam, 750 Holley. I want to use a Edelbrock Performer RPM intake, I seem to remember that port mismatches aren't as critical below 500 HP. Does anyone have an opinion with using the C1AE heads and this intake? I
Thanks in advance

 

If I remember right the C1AE have the larger ports so you would probably have to gasket match the manifold ports so you don't have a ledge .

 

Those are low riser heads. Just leave the heads and Edelbrock RPM ports alone, you'll be fine.

I will mention that C1AE heads have a different exhaust layout than typical truck heads, so expect a little work when bolting on some headers.