64 Dart Driveshaft Length

So, what you need is a driveshaft from a 64 or 65 Dart with an 8 3/4 rear, I am not sure if they used 8 3/4 rears in A bodies in 64 so it may be 65 only. Also note that a Valiant won't work because of the difference in wheelbase. I believe shortening your current driveshaft would be the cheapest route assuming that your front joint is in good shape.