For some reason I stopped getting emails that there were comments on this post.
Anyway, I have grand notions that when the original gas engine goes in mine, I would install a small Kubota. I was going to see if PT would be willing to sell me about a 1' of tub with the thought of welding in an extension between the hyd tank and the rear drive motors. After seeing this I am strangely intrigued. If they filled in the openings with panels and painted it to match, it would of looked halfway decent. A big negative having the engine sit so high would be more top heavy.