It happened! My awesome wife helped me install the mechanical throttle linkage yesterday morning. It then quickly dawned on me... I have a working gas pedal.... I have a working clutch pedal.... and theoretically, my brake pedal should work. So I tightened up some lug nuts, steering wheel, and ziptied some wires back and took her (the car, wife videoing) on her maiden voyage. I was shaking out of sheer excitement. Thanks everyone for all your help thus far.

I still need to do an alignment, temporarily mount the dash so it doesn't come at me when shifting, and wrap up a few wiring odds and ends. Then I can actually go kart it.

https://www.youtube.com/watch?v=zHYcHrT6gM0&t=4s