Well, the rest of the combo is as follows...I am running Canfield Stage 2 Heads, Anderson Hi-Rev roller Hyd Cam (N101) I think was the number. (recommended be Rick Anderson to solve our rev problem) Was using a Cam Motion Custom grind. Both fall in the 680 lift area. Had springs tested by Cory Roth at Fox Lake and they were ok for the cam we are using (Fox Lake also built the heads) It is almost like we are hitting a rev limiter or something. I run EPEC and we set the limiter up as high as 9000 rpms and it still hits that 7000 mark and falls on its nose. Anderson had us do some additional adjusting on the roller rockers and that did not help either???? Really lost on this thing.