73 spool trans mount/ Drive shaft Blues..

swingingdart said
A-727 and 8-3/4.
So I have a little over double what I should have eh?

Your drive shaft should measure 48 1/2 inches Center of U-joint to Center of U-joint with a 111 inch wheel base Dart. 108 inch Wheel base Duster/Demon are 45 1/2