I measured up the starters I have and they all have a center-to-center of 3 1/2" and most of them have a raised boss of 2 7/16" so I don't think they'd fit into the mount correctly. I do have one that's an aftermarket starter for a G50B that has a boss 2 1/4", but still has the 2 1/2" mount. I think the JLO starters may be a better fit, but they'd turn opposite direction. Which way does the starter have to turn in order for you to reverse?
Stuck in the seventies- not in the swamp.
(6) Attex, a Hustler, a Super Swamp Fox, (2) Tricarts, (3) Tri-sports, a Sno-co trike, 3 Dunecycles, and a Starcraft! ...so far