You'll have better luck having your questions answered if you post in YJ Tech. If you look in the FAQs section, I believe they tell you how to measure to see what size lift you have. I believe stock height is 18" at rocker but I don't remember what size the stock tires were, for every inch taller on aftermarket tires I believe you gain a 1/2" lift. Again, post in YJ Tech & read the FAQs in YJ Tech. Hope this helps.
'92 YJ 6cyl 4.0, 33x12.5 BFG ATs on Mickey Thompsons 15x8, estimated 4in lift, Winch, KC lights & some other goodies.
RIP baby brother. "Chopper" Charlie Burke 5/2/82 - 6/22/05...Only the great die young.