I have had custom SB Mopar pistons, not all out race pistons like yours, hard anadized to save them It adds between .0018 to .0025 to the O.D., the ring lands have to be recut also so maybe that is another option If so try calling Embree CO (Aerospace) at 714-546-6907 I always shoot for a perfectly round bore with a torque plate and head gasket I'm going to use on that motor , any decent amchine shop with a Suunen CK10 or later machine can hone any bores straight with the new Diamond stone hones they have now