Its been a day or 1000 but when I had a set of pressed pistons replaced on 360 rods it cost me $175 so maybe $225 now. My 360 had no bore taper so just a WD40 and Ball hone to clean up glazing. I went from stock pistons to a set of 9.5 dished and new Hasting rings.
Edit, that $175 included resizing and hone the big end. I reused the old bearings as they mic'ed OK and had no embeded crap.