had a shop reman a 2.8 for me. had them also install a "RV" cam for more power. Reinstalled engine and have been chasing demons every since. Found a couple of vac and one exhaust leak - fixed them. Checked timing, throttle body, ECU and everthing else I could think of. Was getting gas and spark to all cyls. Runs rough and had NO power. Finally ran a bore scope down pass side cyls and they looked like they are brand new with no signs of combustion. Wondering if the cam may somehow be at fault? How can I verify this?