What kind of Kohler engine is it? To me, "grain auger engine" is like saying "car engine;" It could be any endless number of variations. Iron Kohler engines are heavy and "20hp+" implies that it's also big and has at least two cylinders, meaning it's really heavy. A traditional MB frame isn't going to be substantial enough to support a 200lb engine and 40lbs of torque or more. They probably have output shafts larger than 1", so it would be necessary to run a jackshaft clutch if you couldn't find a suitable industrial clutch.