I got docked at my first MCA show for that, they recommended I add them, but I am not going to do it as you can tell they were never there. My FB was built at the NJ plant April 15th btw.
Will have to look at more pictures to see if we have a pattern. 2 cars is IMHO not enough to make that assumption
Noticed the same thing and have not seen this before (not sure how you mix one side with another - but that would explain what we're seeing on this particular car
Sorry, that was your text from the original post in between the pics I should have removed that. Mine don't look like that. the studs have paint but not the nuts.
Also I checked my carpet while getting the car ready for the grand national show this week, it is the same as of your example with non sewn edges at the firewall and the qtr panel
Also take a look at my trap door arm attachment point under the car. The inserts are there but if you notice they missed the insert on one with one of the screws.