Keith,
Fisher Body never drilled holes in body panels to add trim or fasteners, at least not to my knowledge. Those body panels were pre-"punched" before they were put in the jig to be welded or bolted together, according to the build order for that body.
I know bodies were "banked" at Fisher, then pulled out of inventory (granted, inventory might only last a day or two) when they were scheduled for a final production unit.
I hope JohnZ is looking at this thread, because he KNOWS how it was scheduled.
I'm only an amateur historian.....
