Re: Opinion on International 444
A 1970's tractor with loaded tires would be almost positive they are loaded with calcium, but it's also most likely to be in a tube. i bought a similar size rim, for a 275, from one of our advertisers, partsman, tax included for under $300 Can. I'd keep an eye on the valve stem but it's probably from spillage over the years.
I'd hazard a guess and suggest that your loader is an aftermarket one instead of an IH one. Unless it was a recent addition to the tractor, I wouldn't be overly concerned about it's size. Lift wise, I can't say but my 275 was maxed out at 1000 lbs. It was not happy and protested but it did do the job with a 40 year old hydraulic pump, so I expect yours would be similar.
You shouldn't have any trouble with a 2 furrow plow and 8' of disc. Mine will handle that with no problems. Running a baler could be iffy, don't know for sure though, but a haybine would be no problem. No problems either with a 6' snow blower.
As far as I'm concerned, IH's are tough little tractors and it sounds like the one you are looking at is in pretty good shape. My 275 is over 4000 hours, but it is due for an overhaul. The pump is in for a rebuild right now,I'd still be running it but something came apart inside and it won't start.