I interviewed Bill Jenkins in 1993. He told me that both he and Paul Prior were responsible for getting the L78 engine into the Camaro. This was done for NHRA Super Stock eliminator. And as we know, Jenkins made history and won the NHRA US Nationals (the super bowl of drag racing) in 1967 with this car. There may be a couple of earlier vins but that does not mean they were the first one. The pace cars were modified for the Indy 500. Jenkins sent his engine man, Joe Tryson to the Tech Center in Detroit to pick up this car. Joe drove it back to Malvern, PA with no heater and 4.56 rear axle. This is all straight from the horse's mouth.
Also, the fact that it was picked up at the Tech Center and not Norwood assembly tells the story that this was a very special 1st car production. Jenkins sold it to the Kimble Brothers in 1970 and it was restored many years later. I think d. Mecum owns the car now.
Jerry