im adding front and rear 60's to my yj. from what i can find the brackets for rear disc are very similar and or the same idea. get the brackets, add '76-'87 chev truck rotors. for calipers they sayuse the same year truck front calipers or the '77-'79 eldorado calipers if you want e-brakes at the calipers. down side is the eldorado caliper are more mone yand the e-brake is finicky, this is what ive heard. its been many years since if worked on an eldorado. you could run the truck front calipers and use a ebrake on the back of your t'case, depending on your t/case. this is what im looking to d owith mine. i prefer the keep-it-simple-stupid plan.
as for brackets, balistic fab, blue torch fab, poly performance, tmr (canadian), these all have them for under 100$