RE: Engine needs a home...
What about a Ryan's Rebel?? Type that in the search here and in google and you will see some stuff about it-RCM also has the plan set for this plane. It is designed for the weedie conversions (Ryobi 31cc, Homelite 25cc etc.) so you should be set w/your engine. I am actually planning on doing one soon and will prob. put one of my Homelite 33cc saw conversions in it. The plane is very simple and won't cost a lot to build/outfit. It is reported to have great flying qualities as well. Good luck and let me know what you decide on.