And disc brakes, i'm trying to sell mine and I don't know what year it came out of

 

All years 82-92 could have possibly come with that option. We would need more information to narrow it down further, such as the number of splines on each axle (26 or 28) and what type of disk brakes it has (cast iron or aluminum).

Keep in mind any of this stuff could easily have been swapped out making it even harder to ID. I'm not sure what information you can get from the markings and casting numbers on the housing but if you post those up perhaps somebody could help your further.