Make sure you get some direction on how to set up the multiple double cardan. Unfortunately, it's not as easy as slapping it in there and running any angle as you'd like. I'm sure the folks at Carolina can inform you about the install. At that height, you still should be able to get away with a standard double cardan, but I suppose results vary. Good luck, and report back the results.
'02 WJ: 4.7L, 5", HP44/9", 231HD, 35's
'99 XJ: stock
'99 XJ: stolen
'06 XK: sold
231HD build guide