I cleaned up most of the wiring yesterday and decided to lower the car onto the ground. Just pushing it around in the garage felt good. One more day to reinstall the dash, check the fuel and coolant lines, fill up with fluids, and I should be able to start the engine.
I still need to figure out what to do with the rear axles (Miata ones are too long). I sent a Miata axle to http://www.dutchmanms.com/ for them to take a look at. It will be $495/pr and a couple of weeks if they can match the splines. Assuming that works out there's a good chance I'll be able to take it for a spin in September...