Hey magnmike. A while back I bought a new repro tank from one of the old truck parts dealers. I just used the valve I had, but I think the pipe is just a peice of 1/4" pipe nipple, about 2" long. And if you go to a NAPA store, or some hardware stores, you may find a valve. I know I was going to replace the one on my truck, but since I had such a hard time finding one around here, I just replaced the "O" rings, since leaking was the only thing wrong with it. As for the tank, there is a flaw on the new repro tanks, at least on all the ones I looked at at the vendor. I could not get my valve to seat up and seal. The reason is: If you will look at your old tank, there is a round, flat plate on the botton outside, where the valve screws in. This allows the pipe nipple to screw in, and bottom out against the pipe at the end of the threads. On the new tank, for some reason, they put the plate on the inside. Therefore, I never could get the valve to screw in, tighten up, and seal. Also, there was a metal bur on the threads of the hole in the tank, and ended up stripping out. I took the tank back to the vendor, and ended up getting a clean & seal kit from Eastwood.
I cleaned up my sender unit and got it working, and got a nreplaced the gasket, but did not put any sealer on it. It don't leak. I replaced the doughnut and put new pads under the tank.
Just my 2 cents worth.
KT
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1949 3/4 ton Chevy