Hi DoOver,
As for the cab, I will say that they are defiantly a wonderful item to own. With a coat on, I actually get so warm that I start to sweat in mine. The can ob mine came off an Allis Chalmers 700 GT, and in my opinion, it is far better than the CC ones. It's far roomier. I was lucky and got mine for free, however I did have to clean it up and put new windows in. Parts for the cabs are relatively cheap, so if you fine one, you are set. However you may need to make new mounts for it as there is a good chance any cab you find will be missing the mounts. Many times people forget to remove those parts when they get rid of the tractor/cab.
There is another option here too. If you have a welder and are relatively handy with one you can build a hard cab using flat stock, Plexiglas, and square tubing very easily. The best way to do this is to make rails that fit the contour of the fenders and floorboards first... then build the cab from there on up. Make the windshield hinged at the top so you can get to your gas tank, and put some sort of foam rubber weather-stripping on the bottom of the rails that fit the fenders. This will keep you from loosing paint. Mount a set of headlights on the top of the cab. These are an amazing improvement on the ones mounted in the front of the tractor. I never even turn the tractor lights on anymore, as the cab lights are that much better. A dome light is also handy :wink: Building a cab is a relatively easy option, and actually not that expensive. Plus, you can make it exactly the way you want it. I would also try to put as much glass in it as you can. The factory cabs have some incredibly annoying blind spots.
Just a few thoughts for you to think about. Personally, if i was you i would build my own cab if it is possible. You can't go wrong with something you tailored to your own needs. :wink: Good luck and good hunting. Cheers.