In order to get the correct bilstein's you're going to need to know the following data:
1. Weight (Front/Rear)
2. Spring Rate
3. Eye Type
4. Extended Length
5. Collapsed Length
Once you have that, it's pretty easy to find the correct bilstein's...I went with the 33-185552 which is a 5125 series that has the 255/70 Valving and they ride amazing and have great control. My ramcharger is about a 4" lift but I didn't use a "kit" but custom built the suspension.
I'll never buy another brand of shock I have them on 2 vehicles that I run hard thru some nasty sand on the beach and I coulnd't be happier. I also have Bilstein's on the FJ Cruiser