Can things never be easy? Don't answer that question; I think I already know.

I mocked up the headers tonight to see about clearances. I have stainless 4 into 4 headers supplied by Gas-N and a Levy 408 with RHS heads. I didn't put the header gaskets in place because I can't seem to find them and it was just a quick mock up.

I seem to have a flange fit issue. Bolt and primary spacing seems fine, but the mating surface on the head is not as tall as the flange and, and the head jogs out just above the mating surface, creating a gap where the top of the flange hits.



I'm guessing I'll need to clearance the flange at the top, but I don't know that I have enough room while still having a decent mating surface to get a solid seal.

I'm open to thoughts. Is this a common issue?