The question is: why? first of all these planes are designed and built for electric power which mean very little vibration, which means the structure is not built for noisy, clunky, smelly glow engines.
You;ll be lucky to get one season of flying out of such a plane before it falls apart from the vibrations from a clunky glow engine.
Why not just buy a glow kit and build it as instructed?
Oh, I forgot, almost no one builds anymore.