I am using a 9 inch in my 37 chev pickup project and i was wondering what years and models of cars used disc brakes on their 9 inch, thanks

We run the 95-99 Ford Explorer rear discs on my Son's car, they bolt right on the 70's era torino style housing ends. Ford Motorsports sells a complete kit for about $400 but we got ours from a salvage yard for $150, aftermarket replacement rotors were only like $11 each from NAPA. It was a cheap way to go and they work excellent.
The Ford nine inch came with three different housing ends, the early small, the later large bearing with 3/8" bolts-(this is the one you want) and also the large truck style with large bolts. No factory rear discs came on any housings with the small bearing that I'm aware of and none with the large truck style ends. If you've got the torino style with 3/8" bolts you're in.

Explorer uses mini drums for e brake explorers are supposed to be easy for ford 8 inch conversions also ...optional mercury monarch and lincoln versallies used disc only .. but they have an entirely different brake set up and replacement parts are hard to find... I saw a site last week thad had lots of conversion kits ... one of their conversione used caddy calipers with built in e brake. .. I have rear disc stuff off a couple of 84 -85 lincoln town car 8.8 they are supposed to be bolt on....they have disc e brake I haven't tried to put it all together... I did put a lincoln on a 8,8 mustang had to use 2 ranger pickup axle shafts to switch to 5 bolt wheels

some of the big lincoln 70's marks had rear discs and a 5 on 5 wheel pattern I don't know if they fill fit the truck rear end ...tsome lincoln 9 3/8 parts interchange with other Ford stuff... I have a big lincoln disc under one of my buckets

I have a 9inch under my 31chev, it's out of a town car,with 5 on 5 bolt pattern it has disc rotors from a jeep grand cherokee, and calipers from a 90 monte carlo, the brackets are weld on items from Day Motorsports. They also have disc brake setups for different ford rearends, some are no-weld, and just bolt on with rotor hats that slide over your lugs.