I just did this when I put in my new rack a couple weeks ago. As stated earlier it's the 2 bolts that hold the rack to the k member and the two that hold the tie rods to the wheel assembly. The headers never came into play either way for me
The bolts on the K member were a huge PITA for me. I'd say wait til your putting in the manual rack, otherwise it's just the four bolts and the new bushings can be tapped in easily by hand.