Found another movie! I'll have to contact the studio to see which film car company they use.
"Far from Heaven"
http://imcdb.org/vehicle_23743-Buick-Century-1958.html
(both vehicles to which I'm referring can be seen in the picture)
1958 Buick (possibly same Special 41)
1955 Chevrolet (possibly same Bel Air)

Interesting...

1958 Buick Special 4 Door Sedan Model 41
The Producers
http://imcdb.org/vehicle_32594-Buick-Special-1958.html
The Hoax
http://imcdb.org/vehicle_131265-Buick-Special-41-1958.html

1959 Dodge Coronet MD1/2L-41
The Producers
http://imcdb.org/vehicle.php?id=32592
The Hoax
http://imcdb.org/vehicle_131261-Dodge-Coronet-41-1959.html

1955 Chevrolet 210/Bel Air?
The Producers
http://imcdb.org/vehicle_32593-Chevrolet-Bel-Air-1955.html
The Hoax
http://imcdb.org/vehicle_131253-Chevrolet-Two-Ten-1955.html

If we are certain that these are the same cars, it could resolve our issue with the 55 Chevrolet.