I have a reproduction gas tank petcock that consists of a brass body and tapered rotor. There is no packing or o-rings, and of course it leaks fuel past the handle end. I don't know for sure yet, but I assume it's also leaking through to the fuel line.
The Palmer book suggests lapping this valve, which I have tried without success. I'm trying to keep this project "period correct", and don't want to use hose and clamps. Any ideas?