I will get back to you with the exact build date. The car is a late '68 build. I have general car knowledge .. but am limited when it comes to restoring a car 'correct', so bear with me thanks. I just figured it originally must of had 2.5" rear drums and been swapped simply because that is what so many on forums etc say. That would be great news if the otherwise was true for this car.

The Charger is in storage and hard for me to access, so does that number 36418 shown in the pic definitely mean there are 3" drums in back currently?