Hi Scott,my research so far on 1968 Z28 # 124378N420159,04D that may have been used by Watkins Glen Race Track.The new owner spoke with the original owner and he was told that the Camaro was used at the race track,it had 7018 miles on the odometer when he bought it Oct.16 1968..According to the POP,.Clen Chevrolet in Watkins Glen NY.date is 5/10/68 .I have been in touch with IMRRC ,a racing research center in Watkins Glen .They are looking into it but nothing yet.There is evidence the Camaro did have rear bumper guards but he doesn't see any evidence for the frt.bumper guards.,,,Mitchell