Magnum 5.9 piston crown thickness

Dale Davies said
Now I see why the fairly large deck clearance, turbos. Where that little nick is in the side of the dish, you want to lay that back about 1/4" following the outer diameter of the valve cutout, from that nick up to the crown.

That piston was merely a test. If I have to cut the pistons I’m using, they will get softened after fly cutting.