You might find some of these interesting!
Here’s a 1 page, 2 sided, (8.5×11) color sheet describing the Buick WE4:
Factory photo for the 1985 Buick Regal with option WH1:
bad to the bone factory buick advertisement for the Regal Grand National:
This was a professional photo taken of the 1986 buick grand national and used in one of the sales catalogs (buyer guides) as the backdrop on the page! (I owned this piece at one time, this was the “original” artwork used for mockup & placement purposes for the book! it had all kinds of written info & notes on the back used for production!)
the street legal regal ad that was ran in select magazines back in the day: