Im starting to asemble my 383 an i have a set of SCAT 4340 2-IRC5700 Rods. They are bushed. The ? is should they just slip over the pin and be able to spin them or should the have to be forced in. All of mine had to be forced in, almost pressed in. The postons i have are SpeedPro flat tops with the C-clips to hold the pins in. The pins go into the pistons prety easy wich is normal i beleave.