I've got a 52 3/4 ton and I'm currently rebuilding the front axle. Was having a really hard time finding drums for those Huck brakes but I recently acquired a rear diff from a nissan titan and really considered that. They use rear disc so the fronts will need to be changed to disc as well. After some research I found the late 80's to 90's 2500s have 6 lugs and they are the rotor and hub together with bearing on them. I was going to try and get it mounted to the spindle and a bracket to mount a caliper. That was really the only idea I had for disc brakes on the 3/4 ton. Maybe an 8 lug rotor/hub could be fitted to the spindles and then just a custom mounting bracket for the caliper
