Waaay overkill in my opinion. I saw a reveiw of one a while back in I think MAN and they only had a OS FX .61 in it which is the smallest recommended engine. You would have major balancing issues too. I had a Moki 2.10 in my TF P-51, but that is a much bigger, stronger frame. And much heavier. Can understand why you'd want to use the Moki though. There awesome engines. Just my thoughts.

UPDATE: I have since found that it was the Aug '04 issue of MAN. He did use a FX.61 which does seem like it would be underpowered, but doesn't mention how it flew it from what I read.