I may have a drive shaft for you, it came out of a 64 dart with a 4 speed and a 8 3/4 rear end. if it is the same length then it should work for you.
it is better than the stock ball and trunnion. what I am not sure of is the difference in wheelbase between the 64 dart and the 65 valiant. What I will say is good luck finding the correct speedo gear for the 64 833.
64 Dart Driveshaft Length
