I ended up with a box of slides from a major Buick-Oldsmobile show previewing the 1977 Buick and Oldsmobile models.
Jack Humbert, the greatly respected Pontiac studio chief in those years, was very tolerant of my naiveté.
Videos from Archive.org.
Illustrations accompanying the New York Times article published August 26, 2007
Renderings by Jerry Hirschberg, Bill Porter, Allan Flowers, and yours truly.