Underarock, I installed a BDS level spacer, FOX 2.0 shocks (which are longer front and rear). I ended up putting a 1" spacer in the rear because when I'm towing the rear drops just enough to make the rear sit lower than the front. I already had the longer shocks in the rear so the 1" spacer was not a big deal. I wish I would have done leveling front springs though, and not spacers. They snap at full lock. I just live with it. They are done right they have done it since I installed them. Only notice it in a parking lot.
Not sure about the bar you are referring to, unless it's the adjustable track bar. I would like to get one eventually, but it's not really needed. I've had mine on the alignment rack and I did it my self and it was fine.
Hope this helps.