It is a good engine, no doubt. Check with carrprecision and they sell the conversion parts, I think BCMA and whackermotors do the same engine but I don't recall off the top of my head, point being they are available. I am a big fan of the Rascal 110, that would be a nice match for that motor if you want a nice ARF. For kits, the 1/4 scale D VII from Balsa USA would be an OK match for that engine. You won't have insane power but for putting around the sky in a scale manner, you would be grinning ear to ear. It has been flown on the Honda GX35, Briggs and Stratton 34 and I think a GX31 too.