Another animated movie for which I have no pics is "Beavis and Butt-head Do America(1996)(
http://www.imdb.com/title/tt0115641/ )," which is of course, based on the 1993-1997 MTV Cartoon.
Muddy Grimes' car is a 1972 Lincoln Continental Mark IV.
The van that Harlan & Earl(the two thieves who stole B&B's TV) is either a GMC Safari or Chevrolet Astro.
Dallas Grimes' car is either a 1970-73 Chevrolet Camaro of 1970-73 Pontiac Firebird. I'll have to watch it again to be sure of which.
Tom and Marcie Anderson use a Jeep Wagoneer or Cherokee to town their tralier across the country.
A separate thread should be made for the regular series.