rear disc brake conversion

alright im planing on doing a rear disc brake conversion... do i have to use the disc brakes from a 94-00 teg or could i use the ones from a 90-93?

When I did mine it was from a 95 LS. I didnt need to buy one other part other then what was on that car, very easy swap. I dont know if you can use a 93 or older, someone on here should know, good luck

Kyle