Directions on how to adjust T-bars... The number of times you'll need to turn the bolt varies from X to X - heck on mine I had to turn the passenger side a few more times than the drivers side. It's been a while, so I don't remember exactly how many turns I did.
The shackles are easy - you'll need a 12mm and 14mm socket, 14mm wrench, jack, bolck of wood, and want to have a rubber mallet. Undo the rear sway bar first -one bolt and nut located by the top of the shocks - just disconnect the top part. Using the 12mm socket, undo the last (rearmost) hanger for the exhuast - this will make getting the4 drivers side shackle out much easier. Take the wood and chaulk a front tire.(The following part can be done by one person, but is much easier with someone to operate the jack while you manuver the shackle) - Loosen the nuts on the stock shacle(should be a 14mm, but I could be recalling incorrectly) Put the jack just in front of the spring hanger, and raise the jack until the rear tire is just about to come off the ground. The shackle should be perpendicular to the ground. Take the nuts off of the shackles, remove the first side of the shackle, and then slide the other side of the shackle off - you may need to raise/lower the jack to get the shackle to come out or You may find just giving the shackle some good whacks with the Rubber mallet will get the shackle right out. keep yourt hand on the end of the mallet, so you don't get your fingers between the spring and the hanger just in case the jack slips out.
Insert new shackle, and adjust jack as needed to assit in getting new shackle lined up properly.