I fly a Morris great Knife with a G-62 on the nose. Great for 3d, I think it is the best 3d trainer going. It floats better and slows down better and knife edges better then the giant Su-do-koi that it replaced.
I have flown the great knife with a ST3000, US 41,Satio 270 twin, and the G-62.Now the g-62 is not stock but it is the best set up that I have found. I it's really over powered but I like to hover just off the throttle trim. That way I can leave the hover when and how I want.

Now I think any of the planes would work with a gas engine you will just have to built it with the gas engine in mind.( moving servo and radio gear to get the cg right. Add some to the fire wall)

I think any 80" profile would need more motor then a 24cc engine.
But then I like my planes with way to much power.

Scott