Drive shaft help

A 66 Valiant or Barracuda driveshaft is what you need. 66 is the 1st year for slip yoke shafts. In 67 they lengthened the wheel base on the Valiant/ Barracuda so that wont work. And Dart has a longer wheelbase than Valiant/Barracuda 63-66 so that wont work. And a side note that all Valiant/Dart wagons share the Valiant wheel base.