I used a 1996 Chevy p30 axle and drag link, which I had acquired. A lot of head scratching with converting from "dual" to single rear wheel hubs, and shortening the axle beam itself.
If I used a regular gm Saginaw box, the truck will steer to the right if your turn the steering wheel to the left. Hence the "reverse rotation" box that the dodge 4x4 trucks in the mid 70s.
I'm not sure what bolt on kits work with the 1tons. I went my own route with power steering/disc brake conversion
