1964 Dodge Dart 270 Slant Six Restoration

I've had the car back for a week now and it's time for the update.

Ended up spending 2280USD in order to get it fixed. That covered fixing the rear differential, rear brake lines, engine tuneup (new wires, plugs, fixing a vacuum leak, new gaskets) and a few miscellaneous things (carburetor adjustment and parking cable fix for example).

Currently the engine is running much better, but yesterday the Drive pushbutton came detached. As far as i can tell, it's just the button, but I don't know what to do. I'm planning to take off the dash this weekend to see what the issue is, but any advice is appreciated.

The emergency brake is presently inoperational. I've got new cables in, but there's a spacer that goes on the rear wheels to keep tension in the system that's missing from both wheels. The seller I've found in alabama wants $80/part, so I'm looking for other options.

The speedometer, odometer, and other gauges still aren't functioning, and there's still an issue with the gas tank.

I will hear any advice that y'all have