Thanks for the reply, I am a novice, no flow bench, following the article "double take 360" in Mopar Muscle Feb 2000. I havent worked on the intake manifold to head surface yet. I am working on the part of the guide boss that hooks over into the air flow. There is a hump there that I would really like to take down. Cant tell from the article if they did or not. I have ony worked on the guide boss material so far, widening the path but not taking the hump of the roof.