That's a tough one, I can't say at this point. I have done search after search and it's darn complicated. I really don's see why not, it's actually simple wiring, it's all about the switching to ground. I really wish I could help, MY problem was that the wires from the switch were pinched between the left hand side fuel tank frame mounts, squished all the switch wires to ground. It was a pretty easy fix for me once I started tracing wires. But these were a factory wiring set-up, and the last owner replaced the tanks with new, and pinched the factory wires between the tank mounts and frame upon re-installation. An easy fix, but a hard to find issue. Wish I could help.
Hell, I don't know why you could not just use a basic momentary toggle switch on any 6-port valve, and NOT use any of the ports you do not need, it's not complicated. You have two suctions going to fuel pump, and two returns going back to the tanks (left tank, right tank) and a momerntary switch for each. The valve determines both suction to carb and return to tank. And the valve automatically switches the fuel gauge to read which tank is being used.
It's almost impossibe to explain in words, but the wiring diagrams I have found here are almost just as impossible to understand as well. It's the damn dash switch that is the most confusing in words, diagrams, and theory. But I know, for a fact, that it is simple, once you understand it...if that makes any sense at all.
For most of us, it's the damn Ground wire. The tanks senders are grounded to the frame? I don't know. The dashboard switch is grounded where? It shows that it has a ground, but where is it grounded to? Or the switch uses the ground off of the tank senders, hell I don't know, the schematics suck.
As I said, I fixed mine by finding pinched wires on the left tank mounts, but before that I was assuming that I had bad grounds or sending wires and I still could not figure out all the F'n posts here.
I wish someone smarter than I would do a complete breakdown, wire-by-wire, to help us all out. OR maybe I'm just a freakin moron.
Good luck Brother.