[William]

Chevrolet did keep records for the length of the warranty period. I wrote them many years ago concerning a Z/28 I owned. I received a response from R.M Semanisin dated August 22, 1978 that stated in part:

"Unfortunately we are unable to assist you regarding your request inasmuch as the vehicle history file for 1969 has long been discarded."

No sinister plot here. They no longer needed the files and discarded them long before anyone was restoring the cars.

Don't compare Chevrolet to Pontiac. In those days Chevy had numerous plants and built far more vehicles.