Mike, my preference is that you start with the areas that are most seen and will thus be most "critiqued". So I prefer fit up the doors (A pillar repair as needed) get gaps set around perimeter of the door to establish a baseline, and work on what I refer to as the "door frame". Get the outer rocker, cab corner, etc. clamped in place, re-visit door gap consistency, and then weld those components in.
A slight misalignment on the inside stuff is less cause for alarm under a floor mat/carpet, but if you started there and worked your way out, once misalignment starts to compound with each successive panel, by the time you reach the outside panels you have noticeable flaws and excuses to make..
