Today I fixed the odometer. I pulled the instrument cluster and removed the speedometer/odometer. I removed the shaft for the odometer and roughed p the shaft where it contacts the first gear. Then I reassembled it and shoved a shim near the first gear. Then I used a needle to put a little blue loctite on the shaft.
Since my new engine was rebuilt ~60000 miles ago, I reset the odometer to 60000. It took some fiddling to get the gears all lined up correctly but it wasn't too bad. I have a few miles on the car and it still works.

While I was in there, I replaced the dash lights with red LED lights. Have to wait until dark to see if they work.

Now the seatbelt light flashes all the time though, but I'll open a separate thread about it if I can't find a solution.