I agree Richard, It does read like a basicaly stock engine with to much cam.
So have you left out some info on this build or is it like we think simply to much cam for your engine ? I have to admit i have learned severl years ago that you can't just slap a big cam in any engine and expect it to perform.
In most cases something going to give up, Like maybe a valve through the top of a piston and through the side of the cylinder wall. Please don't ask me how i know this.