Go with rear add a leafs than longer shackles, the add aleafs will not only raise the back end of your truck...they will make the ride better, handle a bit more payload without sagging and extend the life of your springpack...all for about the same cost as the shackles. You do need to run longer shocks but for the shackles you do as well.
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FSRBIKER
97 TJ, 2" lift, 32's
69 Bronco, locked Dana 44, 35" MTR's, 5.5" lift
EOE...Opening Soon!