Depending on what size lift you're putting on, you may or may not need lift shackles. If you're getting "new" ones, then it would be worth your time and $$$ to get greasables. IIRC, Currie has a 'no lift' boom style greasable, or a 1/2" lift one.
'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. <><