Quote Originally Posted by ScottyDoggs View Post
your best to reuse the stock metal exhaust gaskets on the heads, those dont leak.

the surging sounds like a vac leak. a large leak makes it sound like its the most awesome cam known to man lol

leaning over the engine installing the headers could have broken one or pulled it off.
We(he) did that on the 1st install, broke the elbow that connects the line from EGR valve to Throttle body, lol. Yes, will be looking for more vacuum leaks today

He did save the OE gaskets at least, and the front is easy to do.