Need advice with new heads

My only real concern is the deck height of the pistons. If it's .018" above like the catalog says, you need a thick enough gasket to keep the head away from the piston. With a 4" bore you can go to a piston to head distance of .030 with no issues from rocking. Between .030 and .050 it's affective. Once you get wider than .050 there isn't much positive effect. Past .060 there isnt much of anything.