1976 k20 fuel tank switching valve issue

[Bladeboy1998]

So my fuel tank valve finally went bad after 44 years, it was drawing fuel from both tanks and one went empty so it sucked air and wouldn't run. I ordered the standard motor products fv1t valve, only issue is it's for 5/16 line not 3/8. I can't find a 1 wire controlled 3/8 valve anywhere. I'd rather not go to a manual valve just because the truck is so original I'd like to keep it that way. Does anybody have any leads on a new valve that would work? Or could I adapt a valve that has the return ports and just plug them? The only issue is they have more than 1 wire so I've got to figure out which one switches the valve. Thanks guys!