yeah you'll be fine. I'd do an add-a-leaf kit instead of shackles and you'll still get 2 or 3 inches of lift, depending which kit you go with.
one thing i recommend before doing the body lift is to spray every body mount bolt from the underside with PB blaster once per day for a week before doing the lift. I live in MA and did that and they came out like butter but my truck also has 0 rust and is factory undercoated. Also the body lift should be easy. I did the one on my current truck (2nd one ive done) in 11 hours by myself.
2004 Vermillion Red 4.0 4x4
3" Body Lift
2" Tuff Country AAL
33x12.5R15 BF Goodrich Mud Terrain KM2 on 15x10 Mickey Thompson Sidebiter II
& lots more