I have done the lift that was linked in XJ_rangers post on several XJ's now, and although I have yet to update that tech article, I have found big differences in lift height even between different ZJ V8 coils, that aren't UpCountry. Although there are quite a few different part numbers between the V8 coils, and the tags are color coded as well, I have found that if you get a front coil with an "F" at the beginning of the part number, you will get around 5/8" lift. Not much lift, but the ride is a little more firm, giving real nice handling in corners and a quality ride all around. For the same exceptional quality, but more between 1-1.5" of lift, look for ZJ coils with a "G" at the beginning of the part number. Like was mentioned, there are a lot of part numbers and they don't make a lot of sense, but go for the "G" coils, and you'll do pretty good. Just be sure the "G" coils are off a V8, because the I6 ZJ UpCountry models have "G" coils.
Here are some part numbers to help you out.
ZJ V8 UpCountry front coils: GN 5208 8363
ZJ I6 UpCountry front coils: GP 5208 9141
If you are having a tough time finding the ZJ coils you want, there have been some guys that have used CarQuest coil springs and have gotten about 2.5" of lift out of them, and they are pretty cheap (about $70/pair). Here is one guy that used them:
http://www.cardomain.com/memberpage/557451/2
Here is the part # for the Carquest springs: CarQuest HD XJ springs #CC784 $67.28