UPDATE: So I've finally decided to go with the J35A4 rotating assembly with J32A2 pistons and heads on my J35A4 block. My parts order should be in tomorrow with bearings, rings, gaskets, flex-hone, and engine assembly lube, and I can start the build process. Another question: Since the crank and rods are different and matched up to different pistons, will I need to get the rotating assembly balanced? Also, with the J32A2 pistons in the J35A4 block, should I have a machine shop fit-bore the block to the cylinders, or will the flex-hone be alright? I checked inside diameters of the engine block to check for ovality, and everything is within limits.