In the final stages of getting my 71 fj40 running. Took it to fill the tank and the trip back from the gas station revealed a massive leak from the sending unit. No biggie, I'll replace the gasket....well, like most things it wasn't that simple. Seems that sometime in the past the rubber gasket had been replaced with a much thinner paper gasket allowing the retaining screws for the sending unit to bottom out against the tank. This has forced the ring that the sending unit bolts to, to separate from the tank. The ring literally came off with the sending unit. I'm wondering if anyone has had this issue and if so, did you figure a way to reattach it. Looks to me like it was originally soldered in place. Not sure soldering or welding on a ~ 50 year old tank is the way to go.....any ideas?