[Copied from my post in August] "I don't know if or how well it would work on the Dana 80, but I was able to convert the 14 bolt on my Blazer to disks using front brake parts. I used rotors and caliper brackets from a late 70's 3/4 ton Chevy 4x4, and calipers from the rear of a 77 Eldorado. The Chevy calipers can also be used, but then you don't have an e-brake.
I had to do a little work to the caliper brackets fit, but it was nothing too difficult. I also installed an adjustable proportioning valve in place of the stock one. The brakes now work great, even on steep slopes or ledges with 40" tires. Best of all, the total cost was under $150 (using mainly junkyard parts, I later rebuilt the calipers).
Feel free to email me if you have any questions, I'd also like to know if this works on the 80. "
The caliper brakets I used are drilled for six mounting bolts. I had to open up the I. D. slightly and redrill for the 4 mounting bolts on the rear 14 bolt. The caliper braket also had to be spaced out about an inch from the flange. The Chevy wheels are 8 on 6-1/2, same as the Dodge. I don't know if the flange on the Dodge is the same as the 14 bolt, nor do I know of anyone who has attempted the swap on a Dodge. The setup is a bit crude, but works really well. I imagine that the ABS computer would not appreciate this mod either.
Pete