When I removed the bottom section of the rear seat in the Firebird today, I found the broadcast sheet. Though it's a Pontiac the sheet had "chev" printed along the edge. Also stapled to the carpet at the seam under the passenger seat was the date tag "9-11-68". My trim tag says 03-A, so it shows how long the carpet was stocked. Have pictures if anyone is interested. The rear is dated 2-12-69.