Those appear to be the low compression OEM type piston. I don't know how mild a build you want. That piston will get you about IIRC 7.6 compression ration. It has the full dish in the top of the piston. If you want a little more compression there is a 'D' shaped dish for about 8.3, and there is a LPG piston for about 9.0. The LPG is 'D' shaped also but about half the depth. Those compression number are for a stock motor, nothing off the head or deck.
Larry
