Physically there appears to be enough room but the tank location will be high and you will have to contend with that. When you look at the picture of the plane notice that the engine is located low - long nose sloping downward.

My plane is the "extended" version and I moved the stab up a bit. It flies as well as any Kaos I ever flew with the exception that it doesn't like slow landings, it's not a floater which is why I recommend you build light. With those swept wings and tail pieces it is definitely the sexiest airplane on the ARF filled flightline.