I have a 1980 8x8 Argo with the 16 hp tecumseh. I have found a Kohler Magnum 20 in really good shape. My question is did the Argo ever come with this power plant? And does anyone know if it would fit? I have done some basic measurements and it appears that there will be enough room.(I hope) The Kohler of course is an opposed cylinder motor and is a bit longer from center of shaft to end of head about 3" more than the tecumseh. Can I move the kohler around to allow for the clearance of the transmission? If so I think I would need a longer belt? Any help would be appreciated. It looks like it will fit but if anyone has first hand info this is always best.