Kelderman drop kit for GMT900's

I see you have it on your truck, Pretty happy with it? My wife is dead set on not dropping the Yukon but i have to, its driving me nuts.
Will it work on a 4x4?

also i see in your sig pic you did HID's, is there a kit or did you piece it together. Any info would be greatly appreciated.

Thanks
Josh
 
Just took it off tonight but yes I really liked the kit. Mine is a 4wd and it will also work on AWD.

The hids are from DDM.