I've got a gas Farmall 400 wide front, swartz loader, Loftness 7.5" snowblower, I need to either find a cab or a heat hauser for it, blowing snow with no cab sucks. I used to have an IH856D, it had a cab and Koyker K5 loader, but it was just too big for most things around my house. Dad has a Farmall 400 too with an 8ft blower, no loader. He also has a narrow front H.
Not to side track your thread too much... but this was a couple years ago at my Dad's house when I was thinking about getting a tractor from him to use at my house.
Yard Crawl at Dads House (pic heavy)
The neighbor has a diesel 706, and the other neighbor used to have a gas 806. Before he passed in the early 90's my Uncle did all his field work with a diesel 806 no cab and duals, his loader tractor was a Super MTA diesel (started on gas and then you had to flip the levers to convert it over to run on diesel)
Locally we have an international salvage yard, they may have parts of interest for you. Even if they don't have it, I've found that those guys love all things IH and would be willing to give you information if you call them.
http://www.mitchellstractors.com/
If you look through his 'trucks' page you will see a crew cab, I have been talking with a local business who happens to have a 2wd parked out back with 345/727. One of my first vehicles was a '73 Travel-All had a 345/727, it was loaded. Power windows, power steering, air conditioning, divorced transfer case. The windows and the power steering worked (not much else)
Out at the farm we have a couple Scouts.. one with a 304/T19 (or T18, don't know for certain) and another with a 345/727. If I never mentioned this before, my family had a tendacy to 'collect' items of interest...