RE: I need help picking an engine
Saito 72 or 82 would be a good match... also an O.S. 70 or magnum 70... none of them will make the plane hard to handle. 4 strokes sound better on this type of plane IMHO... they also swing larger props that look better and have a smoother transition and throttle response. Either a 2 stroke or 4 stroke will fly this plane well... if cost is not a factor go 4 stroke hands down.
John