Press fit is easiest if using stock rods. Stock rods are good to about 650hp, well tuned) If using K1 rods, then go with floating pins. If you are just doing a rebuild, and want to use forged, TRW/Sealed Power, are a good choice. They are very heavy, but only because of the wrist pin weight. The TRW wrist pins have a 1/4" hole in them, to help the piston meet factory weight. (NHRA stock legal) If you replace the pistons, be sure to have it balanced. TRW pistons will make it easier to achieve factory balance numbers.