Watched Channel 48 (AMC), in S. Carolina, circa 10 a.m. Wednesday, March 8. They were showing a mid-seventies movie entitled "Seven-Ups" or "7-Ups", with Roy Scheider [the guy from "Jaws"]. MANY seventies Anmerican cars were featured, including big, black Cadillacs ...mostly driven by the Mob (before they discovered Mercedes and stretched Lincolns!)

Also noteworthy were a 1969 flower-car conversion on the Cadillac chassis and a 1970 "Coupe de Ville".

Movie was already listed:
http://www.imcdb.org/movie_70672-The-Seven-Ups.html
but not complete I guess, and without pictures.
I added the two Cadillac, thanks.