1966 Dart GT Slant 6

Bought a new rotor today and put it in. Car runs much better than before. I tried to fix the speedo by shooting some lithium into the cable, but that didn't do anything. Pretty sure the actual speedo is dead now. I read that the worm gears can strip and kill the odometer and speedo and am wondering if that is the issue. Need to look at the speedo the next time I drive it. If that is the issue I wonder if it would make sense to fabricate new worm gears (since I am guessing they no longer exist) out of a harder material.

Really need to put some new shocks all around on the car as well as replace the motor mounts. Motor mounts will have to wait a bit though until I can get my Ranchero out of the driveway. Just replaced the engine in that car and haven't fired it up yet. Still waiting to finish up the exhaust.

I will throw out a very short list to see if anyone has these for sale:
66 GT Speedometer
a couple Spark Plug Tubes
66 Dash Pad