The orange and white Chevy sedan delivery is a '54 with its distinctive vertical grille teeth removed! I wonder if some hot-rodder stole them since they were popular items--they placed more of them in their own '54 Chevy's grilles for that custom touch. Black coupe going down the street is a '49 or '50 Ford and parked at right is a c52-54 Ford.

That's actually a Chevrolet "Sedan Delivery," 1953 I'd say. Sort of a cross between a van and a station wagon, generally with a front seat only. Often used, as the name implies, for delivering smaller items, but I remember seeing them used by plumbers and electricians.