So now I've got a 33 year old brick with new coolant lines, fuel lines, pump/filter, brake lines, rebuild front master, splines checked/lubed, rear diff and engine lube, tires, fork oil, and of course the broken bolt extracted from the oil pan cover. I doubt I'll keep it long enough to know for sure, but it should be good to go for a good, long while.
Only remaining issues to fix are the leaky oil filter cover and the ABS, and I've got the troubleshooting docs printed and ready to review to figure out what's going on.