Just remember that there is some math involved if changing the number of holes. Find the AREA of each hole and multiply by the number of holes. If you're pretty happy with the handling other than chassis slap on big jumps, shoot for close to the same area in a 3-hole piston so you don't upset the general handling characteristics of the truck. Smiley from VRP pistons is a regular here. He may be able to help you also. This is for your SC5M on fairly low bite, right?