To piggyback onto this thread, when did the flat panel get phased out during '67 production?
As you probably know, since they were not built in order we don't have a specific VIN to say when. On the old forum it was noted;
"Flat taillight panels have been found as late as 4/27, while the raised taillight panels have been found as early as 4/17. "I wish we could go back and ask that poster if the comment was based on original cars, not restored cars.
My data file seems to indicate it was a bit later into early May, but that is only based on cars in their current state, not limited to original cars.
There appear to be many cars with the wrong replacement panels in both early and late builds. I'm not sure how that would work with the taillight boxes in the trunk.