I am not an expert, but have developed my oppinions on the issue:
I have also never done it, wondering if it would work.

There is not a kit you can purchase for the 3/4 ton.
Buy brake parts for newer model truck from parts store eg. autozone.com and retrofit them to your truck.
Remove, backing plate and add cylinder bracket, then cut backing plate to fit over and around cylinder. Once the backing plate is cut there is no turning around. Buy 8 lug disk which will fit over front hub. Monkey around with spacing between bracket, spindle, and disk until right.
Buy new wheels 6.5 x 16 and if there is clearance problems use spacers to correct.

Im thinking about trying it.
If this won't work, someone please stop me.