filler neck modification

pishta said

If you are a fabricator, I would cut a metal disk the same size as the ID of the filler tube (so you can wiggle it in there past the rolled edge) and cut a fuel nozzle size hole so the top is very close to the top of the disk and weld it in there (off the tank of course) That way if some fuel backs up, itll hit the dam you just welded in there. Or just hold the filler sideways or upside down.

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As a test (with an extra filler tube! I'm real tempted to just put a 1/2 way around the tube cut/slice in the filler tube, insert blocking plate with a hole in it and weld the darn thing up. that would give the gas fill nozzle something to fit through and enough back pressure so that it kicks of auto fill. but I do like that flap in there even though it doesn't stop any gas from coming back out when driving. I got one of SSdans gas caps and they are NICE! they fit snug and the handle is level like it's supposed to be. so between the flaper and the new cap I ought to be good to go.