Q-Ball:

Want speed? That 61FS should pull a 12x8 fine.

I run a 12x6 three blade on K&B 61 engines without trouble.

The problem will be finding the props in a reversed pitch.

OS used to supply reversed rotation crankshafts, if you can find one you will have a much greater prop selection, as you will use conventional props ane crank the engine "Backwards."

Bill.

PS: Ralph - Beautiful. wr.