Decided to start my attempt of building a disc brake setup for my patrol. instead of using some Nissan parts I have decide to use Toyota parts. I was planning to use a spare set of 4 piston calipers from my 1993 4runner and I have the old rotors from my 1977 Land Cruiser. But the LC rotors bolt the the back of the hub as do the 1993 4runner but somewhere in late 90's the went to a rotor that slips over the top of the hub. I have made a couple brackets over the weekend that will be my starting place. I used a piece of 3/8 flat stock that is 6 inches wide and bored a hole in the center.
I have not drilled bolt holes yet as I do not know the orientation of the caliper yet. I have trimmed down the back side.
I had to clearance the hub a bit on the outer edges at each lug stud to let the rotor drop over the hub.
Then I had to open the lug holes on the rotor to 19/32 and use my dremel to open the rest of the way for desired fit. The next size drill, 5/8, would have been larger than I wanted.