1989 Jeep Wrangler can't find the correct brakes

I work on jeeps for a living in a 4x4 shop. I see this all the time. First check and see if your rearend is actually a jeep rear end. Someone could of swapped another diff. in its place. There should be numbers on the housing just inside of the spring mounts facing to the rear. Cant remember which side but look there. Try and determine that first and get back to us. Thanks Curt

Don't know if this is any help or not, but I had a 1976 Chevy C-10 that I bought brand new that had 10x2 1/2 rear brake shoes on it. so you could take a shoe set into the parts store and compare them.

thank you guys I found out it is a 91 jeep wrangler rear end