I would think talking to BJR would have helped clarify why you dont have teh pressure. The cam is way too big, and probably not installed the way MP intended, unles it was degreed. The things that cause cylinder pressure are static mechanical ratio (not what the book says, what they measure and compute to), cam timing in relation to the piston in it's travel, and rings/valves sealing. Milage, time since rebuild, temps, etc, all mean nothing. The cam is too large, and going with larger valves will hurt it more. You need a cam designed to create cylinder pressure. Not necessarilly bigger, but better. I'd also bet that thing has a true static ratio of about 8:1... Anything uner 100psi is a red flag for me. I would want at least 125psi, preferrably closer to 180. But with low static, and that cam, no way will you get near even the 150 mark.