I would take a hard look at the plane and decide if it will hold up to glow power or whether it will need beefed up.

Depends on how good the design is,, and who designed it. Also I would do some careful research here or on the other rc sites to see what people say about the plane you are looking at to get a better idea what you might need to do or problems you might face with a particular plane.

The warbird designs from top flite would likely be fine either way.

Ed