Bigbadswingdaddy....
I looked into Nv4500 some more. It apears to come in both coarse and fine spline. The coarse spline seems to be compatible with my setup. I might upgrade someday. I will have to keep my eyes open.
At that point I would probably find a donor truck and take the 6.0l or whatever is in the truck with it.
There was one here local that has been sitting a long time. I have talked to the guy on many occasions , he never wants to sell when I have the money. To bad its got the same matching leather bucket seats I have in my truck . 6.0l and 5 speed. Last talk I had was actually with his new wife/gf and she says he is fixing it. August supposedly he is sending it to a shop. Sept I will try again.