Are you talking Samurai or Trackick?
Sami... front axle assembly, front driveline, 4wd transfer case, shifter, and boot.
Trackick...front diff assembly, CVs, hubs, bushings and seals for CVs at the knuckle, front driveline, 4wd transmission, transfer case, rear driveline, shifter and boot, possibly the driver's side frame bracket for the front diff assembly(some came with them, others didn't). Make sure the front and rear gear ratios are the same.