Hi all, it turns out that the newly rebuilt heads have 2 ceased valves. the engine builder didn't replace the valve guides. such an easy problem to diagnose that i looked straight past it. thanks Theo for your help on the matter.

Thanks Theo, i have ran a straight edge across all the valve stems & all the exhaust valves are the same height & all the intakes are approx 0.20 lower than the exhaust valves but all intakes are the same height.
does this still make sense? The push rods that are bending are # 4 & 2 intake.

hi i'm going crazy trying to figure out why my engine is bending 2 inlet push rods on each bank.The car was running perfect before removing the heads,but to keep up to date with newer fuel octane levels i removed the heads to get them rebuilt .the guy decked,replaced valves and serviced both heads. ...