I am very interested in disc brake conversion on 1-1/2 ton. Let us know when its ready. Also, life is much easier where bleeding brakes is concerned with Speed Bleeders. I have them on my 1/2 ton and I will never go back.
This past weekend, I watched an episode of Power Nation where Ian took a disc brake hub from whatever was a good fit with his desired bolt pattern, then just took a cardboard template and cut himself a bracket to hold the calipers, and woohoo!
I know it takes longer than a TV show, but the idea was sound. Start with a large truck rotor readily available and with our bolt pattern (not sure if that exists) and just go to town. I WILL do this upgrade when it comes available.