Normally what i would do is mount the cams in the car line up all the timing marks and turn the crank to ensure no piston is hitting a valve. I would turn the motor by hand and obviously if you cant turn it cause it got hard as all hell that means piston valve contact since doin it by hand you go slow and can feel it out more unlike doing it by motor cranking for u. However if you are doing stage 2 cams wouldnt you degree the cams as well to adjust for that? Do you have adjustable gears or just stock gears?
1996 Mustang GT, 17x9 front and 17x10.5 cobra r replica rims, 255/40/17 front 285/40/17 rear at the moment,
o/r x-pipe flow master 40 series dump downs, cai/ram intake, 75mm c&l throttle body and plenum, pi heads and intake swap, msd wires, stock gears, untuned at the moment, no dyno numbers for now.