Getting near the end of the interior swap on my Custom Sport Wildcat clone. Having laid hands on just about every screw holding anything on to do with the interior, I've noticed that GM. used one type of fasteners on one side and completely different ones holding on the same part on the other side. Some screws were simply missing completely. I would have to say late 60's wasn't Buick's finest hour! Anyway, only one more roof panel to replicate and install, plus the driver's door panel needs work at the bottom of the door card.