Try to get 20" clearance between the frame and the ground. (behind the front wheels) Once you get the old exhaust off, slipping the headers up from the bottom is really no trick- just go slow and watch the corners. Unhook the battery- it gets real close around the battery cable as the header goes up on the right side.
You'll need to pull the rocker moldings off- before you put the pipes on, check the moldings for clearance over the primary tubes. If they hit, a drum sander will make a real clean opening.
Unless you have aluminum heads, I'd install the bolts dry- even with them, I'd go really light on the anti-seize.
After you get everything buttoned up, double check the bolts- tighten them every heat/cool cycle for a couple of weeks (PITA, I know, but easier than replacing gaskets).
I also paint the ID of the pipes with the anti-seize. A real heavy coat. Yes, it drips out and makes a mess for a while, but the pips will come off too.
