I didn't really want to upgrade the springs on the heads. They have 350 psi over the nose at .600 (???) if I remember correctly. Cam you recommended is a nice one. Really hoping to stick with a roller. Yes, converter is coming anyways. I don't really have a goal of 10's or any other number. I asked for "10's" because I wanted to look at more of the wild-built 318's ...