This box narrows in front of the mounting location for the shackle. As you can see, the narrower top portion of the longer shackle allows unrestricted droop. As with any lifted truck, you must get longer brake lines for your truck. Something that isn't usually necessary on other trucks though is longer emergency brake lines. Right now the emergency brake lines are the thing that is preventing further droop in the rear.
Nobody produces an extended emergency brake line for cherokees.
I have considered having custom ones made up, but I have also heard of some other emergency brake lines that will fit cherokees, but are longer. Once I take care of this I will update this article. Longer shocks are a necessity with any lifted truck. On my truck I am using Rancho RS9010's. Some people criticize this shock choice saying that I am limiting compression.