There's a lot more to it that just making up an adapter plate and bolt it on. It ain't cheap unless you have your own machine shop. As stated you can do almost anything with time and money. I would look for an 800/801/ early 4000 "ran when parked" for cheap money in this economy, Switch out the engines, free up the clutch while you have it split.Even someone who has never done one before can do the whole thing in less then a half day. IMO an EZ switch and you'll love the power and hydraulics moving around those bales.
Here is my 8n 2.8 chevy conversion. Beleive me it's a lot of work.