71 Dart A/C car heater issues

It is a little normal for it to work slowly as old as it is. If you can lube up the linkage and the spots where door rotates on the case, that will help. Use something that doesn’t smell as it will get drawn into the air box. I don’t believe they repop the actuators, so used might be your only option, and that is a crapshoot. Looks like you may have got it working.