If you have pistons in the 4.070 bore size, hone the block to 4.078 for all the holes.
Send your pistons to Line2Line coatings and have your pistons coated. They will end up running at .0015-.0020 clearance and they won’t stick or rock.
Last set of pistons I had coated were 320 plus shipping.
I’d rather run used, coated pistons than uncoated new pistons.