Didn't get any pictures this time, but the car is all back together and ready for a test drive. The overdrive checks out electrically, the oil seal for the solenoid is replaced, and all the contacts are working. Had a little glitch with the solenoid when I got it back in; the switch contacts that are supposed to close when it's energized weren't closing. Ended up pulling it back out, taking the cover off, and eyeballing what was happening. The solenoid doesn't fully extend to engage the overdrive gears until you let off the gas, and it turned out the contacts were just a hair's width apart when it was not fully engaged. Literally just had to touch the spring lightly with my finger and then the dash light would light up like it's supposed to. So, a slight adjustment with the needle nose pliers, and now it's working. Solenoid is back in, governor switch appears to be working, gear oil is refilled, transmission cover is bolted back in, new wires are secure, and the seats are bolted back in. Now about that original muffler with the gaping hole in the seam....