You have to cut the threaded part of the crank shorter, mount the flywheel and use a pilot shaft flywheel nut. I did this with my Leopard and the engine was crazy powerful doing hill climbing. I had to use aluminum clutch shoes because the teflon ones wore out too quick. I had to be smooth on the throttle trigger though because the tyres came unglued a lot if I was too quick on accelleration.
This engine was the ringed version and I
NEVER had trouble with overheating, even on days when the temperatures were in the 90's. All this performance was with 10% nitro airplane fuel.