Bent Push Rob Saga

I see the heads have the two groove exhaust valves.
Those typically are used in truck/industrial applications with rotators and short springs.
They usually don’t play well with .450 lift cams, so just make sure someone has verified all the parts being used are compatible.

The intake valves contacting the pistons, barring some other yet to be discovered issue(like stuck valves or pushrods not properly seated in the lifters), would usually only happen if the cam were way advanced(as in installed wrong).