Finally decided that a fuel system upgrade was in order, and thinking that the F/I system conversion deserved a complete upgrade of the selector to ensure a smoother selector. Left-Right-OFF with a lock-out to pull for OFF. The Andair FS20X7-T seems to do that well.
The previously fabricated .063 plate to mount the selector was already drilled for the Vans valve and bolt pattern, so I fabricated a new plate for the Andair. Upon fitting the whole thing it appears that a little more adjustment will be needed to joggle the Right tank feed line.