You cannot use 2wd parts to lower the 4wd. Unfortunately the front end suspension setup is completely different. The 4wd has a solid front axle with yolks and spindles, and the 2wd has independent suspension with control arms.
IF both trucks had Full Independent front suspension like the 3rd gens then it could (possibly) be done.
Cummins, PACCAR, CAT, International, Detroit, ASE Certified.
2015 Ram 1500 Laramie 4x4 Crew in Blue Streak Metallic Pearlcoat-Mopar spray-in Liner, Mopar Mud Flaps, 20% tint, Mopar Side Steps, Best-Top Tri-Fold Bed Cover, DZ Tailgate assist.
2002 Ford Focus ZTW Wagon-loaded, tinted and tunes. 183k miles and counting...
try smaller tires. a size or 2 could make a difference, and be what your looking for. DO NOT CUT YOUR SPRINGS OR GET SMALLER SHOCKS! im unsure of any companies that make lowering kits for 4x4 trucks. good luck!