Yep 80-90. I did mine right down the middle and did 85 to 87.
Just be sure to remove any little c-clips from the outside of your rear drum brakes if you have them. If you don't, the spacers won't fit flush and may cause vibrations or more serious problems.
Green Jeep Member #155
Low Output 4 Cylinder Jeep Member #35
Keep moving forward. But keep an eye on history, for if you don't, you are doomed to repeat it.