I am new to the forum so here is my first post. I have an 01 TJ with a 3" lift. Sitting flat the rear end is 1.5" lower which make the nose point up. The rear end is also a little "spongy" when you press down on the rear bumper. My question is how to best to level it? Should I get new springs, add a spring spacer, or something I am not aware of? When I do lift the back end, is that going to cause any interference angles to worry about. Thanks.