I thought I would start a thread on a 2165 I'm putting together. I'm open to any suggestions. I'm going to be putting a 372 top end on it with a 268 popup piston. At first I was going to try a 266 piston I have but I think I would have to raise the piston skirt a little on the transfer sides. So I decided on a Farmertec 268 windowed piston and I cut a 1mm popup. I also have a Meteor windowed 268 piston on order but for now I'm using the Farmertec one.