I found some neat reading. A very primitive (but looks to be a genuine GM document) parts list for stuff GM had in 1970. At the top right side of the page that will open, you can scroll by clicking on the little page icon.
GMPartsWiki - Super Sport Equipment List November 1970
1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles
1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
I still have these! I ordered these around 1970. The part numbers are probably long obsolete.
