google this to make sure... But I think you need 71-78 chevy 1/2 or 3/4 ton calipers
caliper mounting brackets from a 73-91 1/2 ton chevy 4x4
rotors from a 77-78 cj these rotors are 1 1/8" thick
ebrake cable from a explorer, yours may work.
zj proportioning valve
They sell complete kits for this or search the junkyards. I hear though that its not really worth the effort to put disks on (not much better performance). IDK thats just what I have heard. I find it hard to believe the disks are no better.