Quote Originally Posted by blueguy91 View Post
You do not want to match the heads to the circular primary on headers.

You want the retain the factory "D" shape style port. Over porting will net you no gains
He isn't, he's gonna enlarge everything within the D-shape but he needs it to know exacy what to enlarge. His buisness is mostly all V8 Heads/Manifolds and is not familiar with L67 heads. He is going to gasket match the intake side, open the exhaust side, pop the valves out, look around, and clean up as needed.