Quote Originally Posted by stephen

is there SUPPOSED to be profile difference between the intake and exhaust cams for that head? i had an issue like that on a 240 motor i rebuilt. the exhaust cam had a higher lift than the intake. i crossed up the cams, and one side wouldn't spin. perhaps you either A) put the cams in backwards or B) purchased 2 of the same cams (either 2 intake, or 2 exhaust). in either case, with the motor all together and timed right, the extra tall cam (on the wrong side of course) is causing the valve to slap the piston.....just a thought
see this is what i thought. i was giving him benefit of the doubt. i figure if he is building a motor he couldnt fuck up something as simple as installing cams.