Well, I did the math and the bottom line is I just don't have the pockets to fix the crawler.
At a MINIMUM, I'd be into it for $2000 plus the purchase price and I don't have those kind of resources.
I'll be parting it out, should be able to cover the purchase price and maybe even put a few bucks in my pocket.
Known expenses if I tried to fix it:
Ring gear and pinion - $450 plus shipping. Several people have recommended cleaning up and running the old ones, but the pinion has multiple fracture lines and I wouldn't trust it not to grenade and trash all the other work.
Reverser parts - $450 plus shipping. About the same if I get the parts to eliminate the reverser.
Full set of bearings for the transmission - $550 plus gaskets and incidentals.
Estimated repairs to hydraulic cylinders - $200, and that's if I make do with the pitted rods. At least double and probably triple that if I replace the rods.
Another few hundred for the inevitable gotchas, new fasteners, muffler, genny overhaul, starter overhaul, etc.
Time to run while I still have a shot at breaking even.