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...a guess, I hardly qualify as an expert on cars.

When this car was new, I wasn't yet in my teens. A beautiful vehicle, nonetheless...

1957 Chevrolet El Morocco | The "Poor Man's Cadiallac."

The rarest '57 Chevy made, with only 10-16 2 DR & 4 DR & 3 Convertibles. It is believed that this is the first time that Chevrolet let an outside contracter make modifications and were sold at Chevrolet Dealerships with full factory warranty.

http://www.jaylenosgarage.com/your_garage/cars/717.shtml

Larry/Alice's scan