This GV setup will bolt to any 727 with the long tailshaft. You do not need to change the tailshaft itself. You just need to remove the factory tailshaft housing and bolt the one from this kit on. I put this same kit in a D300 truck and used it for several years, then when I decided to sell the truck, I took it out and installed it into a 71 Challenger. I did have to do some pretty heavy duty beating on the trans tunnel to get it to fit, but it did fit with only that mod. It is still alive and well in Ohio, after I sold the car. The install is pretty easy, and the mechanical parts of the GV are tough as nails. I had another one in a class C motor home on a short tail 727, and the electronics failed on it, and also the electric solenoid. Overall though, one of the best mods I've ever done to a vehicle. Good luck with the sale.
