There was also another Z28 motor posted with the same date code that had a partial vin almost 2000 higher than this one. I don't think they put out 2000 Camaros in one day back then but I guess it's possible if car 1 came off the line first thing in the morning and car 2 came off at the end of the day (They doubled production in May 68 - almost 40,000 cars for the month)