[Masteryota]

Isn't the foreman shaft drive? That is going to be the biggest hurdle to overcome. If you have a source for an ATV diff and axles, then you are a step or two closer, but then space becomes an issue. Most of the buggies I have seen with shaft drive quad engines either set the engine in the passenger side of the main tub, or turn the engine sideways and have a special sprocket hub machined to go on the output.