is there a cheap way to get another 1.5/2 inches out of the rear of my xj. i have already added a leaf to the rear pack and i saw a total of 1.75 inchs. i recently found a great deal on a set of 5 d window wheels and brand new 31x12.5 procomp mud tire. 4 r 90% and one is new. im thinking shackles however if they will take the ride quality away id have to go another route but the cheaper the better thanks