Lift kit install is pretty straight forward as long as you've got a decent set of tall jack stands and a floor jack. 6 hours if you really have no mechanical know how or clue is probably legit. If you know how to turn a wrench though it won't take you nearly that long. My coworker when I was at PA which was also trailmaster suspension was able to knock out jeep lift installs in about 2-2.5 hours working on a hoist with air tools just as a comparison.
Basically, set the frame on the stands, yank the tires, put the jack under the axle and to support it at full droop. Pull the shocks and unbolt the brake line at the frame most likely. Slowly lower the axle down and the coils should fall out. Then swap out all the control arms. Yank the trac bar and put one end of the new one in. Slap the coils back in, put shocks back on, deal with brakelines if needed. Then do the same on the rear. That's the quick version but for the most part that's all that's to it. Once it's on the ground you can check to make sure the axle is centered at ride height. If it's not, pull the track bar back down and adjust it accordingly (I'm assuming your kits coming with an adjustable one since most do these days) and then put it back in. Secret for lining the track bar up is while it's on the ground, go under there and with one end bolted up, swing the other into place. It probably won't line up the bolt hole, have someone turn the steering wheel one way or another till the hole lines up... That's probably the hardest part of the whole install honestly.
Rear trackbar is probably a bracket at the axle that will need some drilling most likely to bolt on or weld it on depending how permanent you want to do it.