I tore into my 'stuck' MD yesterday.Cyl 3 and 4 are rusted. 1 and 2 are clean.All 4 sleeves were loose.They would have fallen out if it got turned upside down.The head wasnt stuck at all,like it was just sitting there.The head is also cracked.Same with the oil pan.It almost fell on my head.Also looks as if it were run out/low on oil. #2 rod brg is rough/scuffed. The crank is OK.The tractor was painted many years ago. But the paint isnt burned off the exhaust manifold.The former owner isnt sure that it's run since the middle '60s.It also sat outside in the mountains at 9000 ft for probably 20 years.I cant find any OH kits anywhere.Are they really unavailable?Starting to look like it's going to be a 'boat anchor'.I guess I'll park it out back till I figure out what to do.....