Fair warning, the article is disappointingly short. Though it is not without its choice quotes:
Not only could you find the same car dressed in more aero, but much less tasteful (to my eyes) clothing as the Caprice on the same lot or a super-sized Cadillac version, but you also couldn’t option up what was advertised as Buick’s biggest car as much as some buyers wanted, lest it top its smaller but more prestigious sibling, the front-drive Park Avenue. The LeSabre also crowded it from below, giving the Roadmaster a very narrow slice of the pie. It was pretty much meant as Grandpa’s last car, since he wouldn’t get in no gosh-darned front wheel drive contraption unless it were a hearse, and even then, he might contrive to fall out the back.