318 pistons

So I have this 1983 cop 318.Pretty sure the pistons are way down in the bore and with the stock 360 heads it might have 7.5:1 comp.Havent had the heads off yet but will soon.

Lookin to raise it when the motor gets redone this winter.What piston will yield the most comp without going over 9.5:1 with the heads getting a minimal cut to clean em up?
I will use an .028 head gasket as well.Might offset grind the crank a wee bit to bring the pistons up also.

A cast piston would be best as this wont be a race engine.Hypers and forged not in budget.

Just lookin for a drop in replacement in maybe .030 with a flat top and good comp height that I can get close to 9:1.