Looking for Speedometer Cable for 65 Dart

Is it connected at both ends? Unscrew the cable from the back of the speedo head and let it dangle beneath the dash. Go for a short ride and see if the inner cable is turning. If it is, then when back home, pull out the inner cable and check its condition. From behind the speedo head, with a short piece of cable or small screwdriver try to turn the speedo, bounce the needle. It will only work one direction. We need to confirm that it is connected, that the cable is turning and that the head is not frozen.