Re: 6 inch lift to Leveling kit; parts
You'll need a stock pitman arm, track bar & bracket or the zone adjustable bar (still uses the stock bracket).. new u-bolts for the front & rear. I've heard you can re-use them, but I'd be cautious on our size trucks.. stock rear blocks, unless they stacked.. or if they went all spring/shackle, you'll need new rear springs/shackles. I think I got it all. Maybe someone else can chime in with something I might have missed..
May be easier grabbing parts from a local salvage yard and building up. Or find someone local to swap.