[quote=Youngblood]I have a 400 getting stroked right now. Block was standard bore, but did not clean up at .030, so my brand new pistons will not work. 4.150 crank, 6.76 rods with .990 pins, looking for flat top or small dish in 040,050,055 now. Anyone carry this in forged shelf piston? Thanks for any direction [/quote

I had a Megablock 4.500 bore rehoned, scratches didn't disappear till 4.5043. I had my old CP pistons coated by Line2Line. Cost $300 but worked great. 550 inch with 440-1 heads made 926 hp using those coated pistons. They coat them within .0025 of actual bore size, then run the motor through a breakin procedure in several steps. I believe in L2L. Coatings. They say they can make up as much as .020 overbore if needed. Call them and discuss your situation.