need some help on a set of hemi pistons i aquired. i cleaned them up today so i can now post what i found. they are marked .030 over and 1 bank has the # 1757lp and the other bank has the same # but the l has a r stamped over top of it so it now reads 1757rp. also 1 bank, but i can't recall which 1, has what looks to be # p56713 but it has been stamped out with a rectangle of dots as to cross it out. i can post pictures if needed but the old dc catalogs and my trw catalogs and hensley's older sale catalogs didn't give me anything. also no dykes rings on these pistons. all help is appreciated! thanks, dave