Just an FYI. Heard through the grapevine that lots of people were breaking their rear track bar that came with the Fabtech 6 inch Long Arm kit. Although I haven't broken mine yet, I decided to call them to see what options I had if I did. They told me that if I had the rear track bar with the upper and lower gussets and it broke they would replace it for free.
The new kits should not have the upper gusset (I think - 1 should be missing anyway ). If you get a new kit make sure it only has one gusset on the rear track bar.
I guess bending or Flexing as Fabtech would call it, is better than breaking.