yes, i'd go with the torsion twist + shackles. tt improves handling but decreases ride smoothness. shackles are sweet lookin. if you dont plan on off roading much i'd get the cheep 20$ shackles from auto zone, if you're not gona be wheelin much then u'll be fine, i go off road all the time and they're workin out for for me. as for the aal i havent got mine yet but will be soon.
install is incredibly easy on the tt + shackles.
tt = jack up the frame on the front, wd-40 the t-bolts crank em up a few notches, lower it check height jack it up even it out done.
Shackles = jack up the rear FRAME till the tires are just barely on the ground. loosen up the old shackles, wd-40, then you'll probably need to hammer them out... the bolts that is. attach the shackle to the frame first then what i did (prob not safe) was get under the truck and suspend my upper body from the end of the leaf spring to get it down to the bolt holes on the bottom of the shackle. anyways shackles alone took all of 15 min.
dont waste ur money paying someone to do it for u (unless its me haha)