I ran 4.5" coils with 2" spacers and had to add lower adj control arms to get everything correct with the diff and driver shaft. Also if the jeep is driving good now for you, then I say leave well enough alone add a 1" body and be done. Why do you need the extra clearance?
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Yeah my jeep is driving great, but my springs have sagged since ive had it front lower and plus a hardtop, I got a set of 4 1" spacers on ebay for a good deal to level it out, would it cause vibrations?