Driveshaft length for 63 Valiant

I am looking for the driveshaft length for a 63 valiant. It will have a 360/904/7.25 with the schumacher mounts. I currently have a driveline that came out of the car, but it is for the 4spd. It has the CV style front joint and bolts on. What can I get a driveline out of that will bolt in? Thanks for the help.

If your car currently has a transmission with a slip yoke then you can use a driveshaft out of any '66-76 A-body with a 108" wheelbase and 7.25 and 4 spd/904 such as Dusters, Valiants and A-body Barracudas. I think the length you need is approximately 51.75" measured from the center of the u-joint caps. Most 4 spds use a 727 slip yoke so you may have to get a 904 slip yoke if you get one out of a 4 spd car.