This is a set of 440 mopar pistons and rods , they have side gas ports, they are coated, they have no nicks or chunk out of them , they have about 30 runs on them, they are a 4.44 bore 12.44 compression 2 are new 6 are used Pistons  , the rods are 7.07 ? long I think,   when in motor with 4250 crank makes a 528 cubic inch ,parts sold as is look at pictures I bought these in a parts lot with other parts  don't know much about these pistons and rods but I'm sure Someone does ,look at pictures one piston has some writing spec on it  any questions ?? I will be happy to answer