I'm new to the Massey Ferguson garden tractors, but not to garden tractors as I have a few old classics soften around. I just bought a MF10 a few days ago for $20 and it looks to be complete minus the engine. Eventually it will be restored to original condition but for now I have a 5hp Briggs & Stratton I/C engine I want to put on it to try it out. It has the vari-drive on it and I need to know does it take a special pulley on the engine or will any pulley work as long as it's the right diameter and width? I do not have the mower deck so I don't need the second groove all I want is to be able to use the vari-drive. Any help will be much appreciated.