RE: What engine for P-39??? help!!!
I have the TF P-39 kit under my workbench as next in line for assembly. I, too, was considering the RCV 60, but somewhere in my research I seem to recall that I was advised it might be too long for the stock installation. If you want much cowling on the right side, it still sounds like a good choice, maybe the only one. Just check the dimensions before you decide to go that route.