383 Piston slap

I'm surprised that piston manufacturers haven't had an "in between" alloy developed yet, with the great qualities from both 2618 & 4032.
I had to have my 4032 pistons coated from line2line coatings and run .0015 p/w clearance with gas ported total seal top rings.
The previous machinist didn't pay attention, nor did the assembler. It had close to .0065 clearance.
(I have had no issues with this engine since)