67-9 Dart Speedometer

I'm looking for a somewhat junk speedo gauge to do some experimenting with. A recent trans swap has left me without a mechanical drive cable, so I wanted to mess with some ideas to make my own electronic to manual conversion kit and didn't want to butcher my nice speedometer. I have the standard gauge set, not sure what all years fit. Don't need it to look pretty or for any other gauges to work since I plan to take it apart anyway.