Sorry, Current - 89, RC 6.5" 4.0, aw4, 231, SYE, Tom Woods DS, 35's , thought that if I left detail out people would assume no change to lift setup, just different rear axle, which would answer some things....
Now I can explain what I am going to. 6.5" RC with .5" or 1" UBE.
I pulled my drive shaft last night and it seemed to be long for my current set up so it worried me about the 8.8 wanting to making it shorter. Which I am guessing the UBE will help that.
When I orginally ordered it they based it on the setup not actual measurement(I know bad plan...) I needed to drive it away when I completed the lift at a buddy's shop... Ok ok back to the issue