Hey,
If you have a flange style front drive output on your transfer case you can use this extension. It is 1 inch thick and is used for the front driveshaft if it uses a flange. I have one on my truck and it works out great. It is solid metal and is very beefy. My u joints/or driveshaft would break way before this thing would even think about it. It worked well for my 6 inch front springs.
Blake