'72 Dart Custom

Anyone else have this problem? Would it be better to take material off the intake or covers?
would you run headers on a combo like mine? I was thinking of just using the stock manifolds. What kind of gain could I expect? Thanks!

i dont know if you got it resolved but i just marked and took out the material off the valve covers. i would also use headers myself, just because....lol

great work, body color engine bays ROCK