The Homelite 45cc make a very powerful and simple conversion, if you buy the reconditioned unit with the old style bolt on carb. If you buy it new, than you have the extra rather difficult step of making an adapter for the carb. Besides that, all that is required are engine mount tabs (or stand-offs) and a prop hub adapter. I would also recommend a different muffler and a velocity stack, you'll save weight and get better performance.