Here's the IMDB link...
http://us.imdb.com/title/tt0089643/
...and here's the IMCDB page...
http://www.imcdb.org/movie.php?id=89643
First the star vehicles...
1972? GMC C Series, four stars (Sally Field's truck)
1927 Studebaker? four stars (James Garner's vehicle)
unknown motorcycle, two stars (This is supposed to be Brian Kerwin's vehicle but we never see him ride)
1965 Ford F-100, three stars (plays an important role near the end of the film)
There must be a zillion, one or two star vehicles in this film...no way am I going to index them all. Some are too small, some are too blurry...but there will be a lot in the film comments.
In the parking lot scene, the camera zooms out from a closeup of a flyer on a car windshield (Buick) to show flyers on all the cars. I'm ranking the one in the closeup two stars, the rest one star.
white Buick (LeSabre?), two stars
1977 Ford LTD (Landau?) one star
Chevrolet Camaro, one star
1972 Plymouth Fury wagon, one star
Ford Escort, one star (there's a blank for this one already, only Escort I ever found)
Oldsmobile Delta 88? two stars
Mercury (Zephyr?), two stars
Ford Thunderbird, one star
Chevrolet Caprice, one star
1956 Ford F-100, one star
1979? Ford F-150, one star
Nissan truck, one star
For the scene at the bench, I didn't use all of the vehicles, just the clearer ones and the ones that seemed to pass by the most often.
Olds convertible, one star
(early Datsun or Toyota right behind it?)
Cadillac Seville, one star
Dodge? Mitsubishi? one star
Chevrolet Impala wagon, one star
Mazda truck, one star
1958 Chevrolet Apache? one star
1970-72 Chevrolet C-60, two stars (Garner and Field sit on the flatbed briefly for a chat)
Chevrolet Camaro, two stars
K Car (Dodge Aries or Plymouth Reliant?), one star
1965 Ford Mustang, one star