I guess I didn't update. They had the car for 4 days total, saved my gears and my bushings, and even gave me the MSM differential pumpkin that they pulled the replacement housing from. Why they didn't just order the housing? I have no idea. But now I have a spare MSM diff out of the whole deal.
I also discovered that my clutch is giving up. At peak torque more than ~80% throttle, the clutch breaks free. If I hold off on hard throttle till past peak torque it will hold fine, but I've been driving around avoiding full throttle for a few weeks. It will get replaced sometime over the winter.
And just picked up a 1991 Celica GTS for a winter beater. 326,000 miles, has been sitting for a year, brakes are bad, brake fluid is black, thermostat is stuck open, a shock is dead, the paint is badly faded, the interior rattles like crazy, and there may be rodents...but the engine and transmission are still solid and it only set me back $700. Just picked up all new pads, coolant, brake fluid, thermostat, belts, oil, filter, and rotors showing up later this week. Once it's solid and passes safety inspection, the MSM is going to go up on jacks for a bit to address a few things.