That part I actually have. I bought a whole tranny from the junk yard that has that plate and the u joint assembly. I thought I found exactly what I needed but unfortunately the u joint is a 10 spline and I needed a 17 spline. I am assuming the truck is a 3/4 but it was hard to tell. It was nothing but a frame engine and tranny sitting in a field. If I cant find that u joint in another week or so I am going to go ahead with the axle swap. In that case I will have a tranny, and complete torque tube axle with leaf springs to sell if anyone is interested.
Thanks for the offer