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.

Interesting...

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)