Chris,
it's in excellent condition. Aside from possible dried up seals, and a brake overhaul, it looks like new. Beautiful car! A classic already.
It has the Olds 307 V8 yes? Do the CV joints click when driving? If not, they are ok, and you only need to replace the boots, and re grease, but if you go to the trouble, you may want to go all the way.
The transmission is the THM 425 with overdrive yes? Not terribly complex. It's pre electronic. It's basically a THM 200 R4 turned sideways and connected with a wide multi row and link chain to the torque convertor, and then a final drive differential bolted to it. With such low mileage, I'm sure the chain hasn't stretched yet.
If there are any minor leaks, I'd try some seal conditioning fluids before investing in a complete tear down.