I have a 6.5 inch IRO long arm lift on my 01 XJ. I added a RC front winch bumper and winch which caused a little dip. I added ACOS spacers and all good. Now I'm looking to add a Smittybilt rear tire carrier bumper. I'm guessing that was cause some sag in the rear? If so, how can I level it out? I already have the 6.5 lift. What else can I do in the rear?