Ken's choices for filling the block are based on experience and the needs of this particular combination. He's quite humble in describing the rotating assembly. "It's nothing really special. The cast crank comes from Mopar Performance (PN P5007257). It uses the 340 main and rod size, but it has a stroke of 3.58 inches. The connecting rods are from Eagle's 'SIR' series in the stock length of 6.123 inches. They are also bronzed bushed and will use the stock .984-inch-diameter wrist pin. The pistons are from Wiseco, from their Pro-Lite series. They will be a 4.030-inch bore, flat-top design with valve reliefs. The rings are from Speed-Pro and use a .043-inch top and second ring with a 3/16-inch oil ring. We'll most likely use a top-drilled gas port. The bearings are Clevite (PN MS540P) on the mains and PN CB481H on the rods. The assembly will be internally balanced."