After rebuilding the front axle with new seals and bearings (both wheel pivots were leaking), and replacing the engine rocker shaft and rockers when I got it, it has run great. I'm painting the wheels right now, and the rest of the original finish still looks real nice. Parts have been no problem so far. I imagine tractor-specific parts like castings and gears would be difficult and must be bought via Japan. But the consumables like bearings, seals and gaskets are all purchased local. All of the Isuzu engine parts I've needed I purchased through DESSCO (Diesel Electric Service and Supply) out of Salt Lake City, UT, by phone.
Bill