I don't want to hijack this thread but I have a quick question that somewhat coincides with what dstan is asking. I have nearly the same set up dstan has and I like the Comp Cam 21-227-4. I confirmed the selection with Comp Cam. That selection included the running of Edelbrock AL Rpm Heads. It was mentioned that going over .5 lift is a bit concerning. Is it for the RPM heads? I have never been able to assertain how much more lift the RPM Heads would allow me vs the stock heads. Also, I am told by the builder that the compression is 9.7 The comp cam spec says it is best on a 9.1 compression engine. Is this difference in compression that critical on the selection of the cam? If so, how much and in what Spec? Also, Comp Cam says the 21-227-4 gives extra lift for Upper RPM Power. What is I want mid-range power? Any suggestions? Again, I apologizes if you feel I hijacked dstan's thread.
