I just now found an old sheet of paper stuck to a piece of cardboard inside the bench seat in my 1970 Chevelle SS. It's 5 inches wide and 6 inches high, torn (not cut) at the top and bottom. There are four lines of information, handwritten in ink. Is this a build sheet? And can someone please decode the numbers? First line: -S90- (or perhaps it's -590-). Second line: 13637-795. Third line: AK1 A39 B22. Fourth line: M20 3741. I'm hoping one of these is the zone and dealer number, because I'm trying to find the car's original owner. Thanks! -- Jon