Like AEdelheit said you should run longer control arms, swaybar links, and an adjustable trac bar with a 3" level. Stock shots might work, mine were okay with a 2" level.
3" will put you at or above level, so if you haul/tow you will have a rear end low stance without airbags with little weight.
Your ride will also suffer quite a bit. I took my 2" level out for a 1" level and couldn't beleive how much smoother my ride was.