Which engine for this baler

 I just like the engine driven balers can use a smaller tractor and increase capacity,shorter turns etc. but my old wisconsin is getting tired and looking at replacing it with a diesel,thinking about a engine out of a 3000 ford tractor but I dont know how I could hook up the pulley without a lot of trouble trying to find a bellhousing or making one which will be out of my machinist capabilities,thought about one of those big honda  engines but dont think the aluminum engine will last with the side pull from tightening the belts anybody got any suggestions?  I am going to try and download a picture of my 570 that I put the wisconsin on

Which engine for this baler