It was brought up what the designation was for the Unlimited. Ive been digging up some info.
The trim package designations are
SE: A or N
X: X
Sport: D
Unlim: E
Saha: G
Rubi: U
For the older Jeeps, the 4th and 5th digits identify the model
CJ 5: 85
CJ 7: 87
CJ 8: 88