Every motor out there are not the same on deck height or combustion chamber sizes, you need to check yours first to find out the correct answer
I do know one local Mopar M.W. racer that switch to a set of aluminum heads with angle plugs from the original stock iron M.W. heads and he had to cut the side of the piston dome a little to clear the angle plugs, this was on a 440 motor with a set of Indy SR M.W. heads