Yup, 9-32 tires. Here's the update so far:
Pulled the head off. one broken valve, one rather rusty cylinder. All cylinders were siezed, but some work with a block of wood, mallet, and penetrating oil got them freed up. The broken valve is also rusted into it's guide. Still, doesn't look too bad. The back half of the tractor is rusty as heck, but otherwise very solid. Input shaft turns freely, gears move through all the gears, oil level in the gearbox was a touch low but it was high enough to keep all the gears covered. Hydraulic system seems fine. Using my cordless drill to turn the pto shaft, the 3pt arms raise and lower appropriately. One back tire has a slow leak, and I assume one front tire as well. When I picked up the tractor (halves) one each were flat, but both took air and are still holding it. One of the spindles has had the spindle arm welded onto it. Carb is dirty, but surprisingly in good shape; both the throttle plate and choke plate were closed, so not much was able to get into the carb. The distributor had a mud-dauber wasp nest in it (inactive) but otherwise seems to be in good shape. Haven't taken off the governor yet. The starter was inop, but a bit of work freeing up the brushes got it going strongly again. There's no wiring left to speak of, so that'll have to be made. All in all, I'm cautiously optimistic.
