Be absolutely sure that you get the right length. I went through this this past August. I ordered a T&T bar for a 6.5" lift and when I got the tracbar, it was too long. I was a bit peeved. I called them, and they said that they sent me the correct one and that the problem was with my springs. Apparently when they designed the tracbar they take into account the 1"-2" extra that you get from NEW springs, and since my springs were actually broken in and sat at 6.5" the bar was too short.
Long story short, I had a local welder cut out the threaded insert and lop 1" off of the tracbar. It fits, but barely. You can see how much thread engagement that I have on the tracbar now (which is good I guess...more thread contact=more strength).