WOW....My Bad..... I usually am on top of things and didn't realize that I was in the 83" version of this plane. My comentary of engine size was directed at the 50 size which I do own. Yes a 120 on the 83" would be good and I think a perfect match is the Evolution 26GX. This engine is in at just over 2lbs and will fit inside the cowl with very little, if any, modification. I would be a little worried at the weight penality of the Zenoah G26 and the fact that it would not fit in the beautiful cowl without hangine a bunch of stuff out in the breeze.

I tried to get the 83" from Nitro when they went on sale but they sold out before I could get one, seriously bumbed out

Sorry to shoot off about something I was not totally in tune with.