If this is your daily driver I advise you dont start this till you've fully researched everything to it, as well as other peoples' experiences while doing it and afterwards the things they noticed or wished they done, etc. You might have to take a couple of the springs out of the pack, so you'd need new centerbolts. You'll need new u-bolts, never was a fan of re-using really old ones. Since moving the front spring perches forward will only gain you about 2" you may need longer shackles in the back. Your stock springs are 48" and the ones you're putting in are 52". If you moved the front perches forward 4" you would throw the steering geometry all out of whack, may cause your front driveshaft to over-extend, and have your tires not centered in the wheel wells right. So you have to move the front forward 2" and the rear back 2" to keep everything centered.