I don't know if has been proven but some say the first production cowl hoods were on the ZL1 Camaros
this road test article of the two ZL1s , shows number one and said the other ZL 1 is number 5 and it had 25 miles on it when picked up to drive it to the drag strip
both were dusk blue
The complete history of the ZL-1 engine project at Chevrolet is being researched; the author for this famous track test was interviewed. He stated the test took place on an unusually warm day in late January, 1969. The street ZL-1 Camaro used was definitely the #2 car. The #5 ZL-1 was final-assembled on or about March 4, 1969. Several original photographs from the article were obtained, one showing the #2 car parked in Dick Harrell's shop. A wall calendar set to January 1969 is seen in the photo.
There has been some controversy concerning #5 as raced by Shay Nichols. Period photos show it with a white standard interior; all 50 Fred Gibb ZL-1s had black standard interiors. Gibb dealership records show #5 was sold to Phil and Shay Nichols on May 7, 1969. Obviously, had an interior swap. Last known owner claims it was beyond repair and was junked. #2 still exists.