[basketcase]

My '69 has a stainless plate that does the same job as those stickers above but doesn't have a build month/year on it (Fremont California assembled truck). If you could find a reference to the ending serial number by month you could then figure the average number of trucks built by day. But then you would need to know if they worked on weekends, how many shifts per day, holidays, history of line or labor problems that may have stopped production for hours or even days, ect. Eventually you could get it down to shift and even a good guess as to time of day. It would take a lot of research but the Corvette, Camaro and other GM guys heave been able to find this info. Talking to them would be a good pace to start researching. They may have actually acquired this info along with the other car lines they got from GM archives.