The 5" drop will usually require brackets that relocate the lower trailing arm, shorter sway bar links, and shock extenders or new shocks. On the DJM rear kit for the NNBS suburban, I had to move the sway bar over 3/4 inch and drill new holes for the bracket. You also might want to cut off the bumpstop bracket to gain more travel. I had my 07 sub at a 3/5 and 24's, but now have it leveled with dune grapplers on 22" centerlines. Here's an old pic at 2/4 with the 24's. I don't have any pics at 3/5, it only lasted a few months.