The tail lights were broken--and out-of-stock, so he bought some aftermarket ones, and made a plate to make them fit and custom harnesses and installed a modern relay, a jumper, and a new horn.
The car originally had separate back-up lights, but the aftermarket assembly has those, so he 3d-printed a blanking plate.
One of the flexible transmission coupler is broken and he temporarily replaced it, but the first time he showed it moving, he pushed it backward, so that shouldn't be a significant problem.
He spent two days trying to figure out why it wouldn't shift into reverse and someone suggested the problem was under a cover, so he bought a manual: