Stock shackles are fine with 4" of lift. You will clear the 33's just fine.
If you can afford it, an SYE is a must with that much lift, IMO. You can
get away without, but in time you will start going through ujoints. I'm not a fan of BL over 1", but that's your call. I'm also not up on RC kits, and it should have all you need to do thet lift, but two things I would change are replace sway links with sway disco's. And get longer SS braided brake lines for the front.
'05 LJR, 6sp, RC long arm w/MC 6" coils, 5.13 D44's w/chromo shafts, MetalCloak fenders/sliders/body armor, 37x12.50 MTR's, Warn 9.5, RockHard swing out w/full spare. <><