"You're ahead for keeps in your new Plymouth" read the ads in 1958.
The Belvedere was advertised as "Plymouth's premier line of great automobiles."
THE BELVEDERE LINE
Pictured below are the five body styles that the 1958 Belvedere was offered in. Various options the buyer could choose from included the engine size (V8 or 6 cylinder) and exterior trim package (Sportone side trim filled with either a contrasting paint color or silver anodized aluminum, chrome bumper wing guards, stainless steel wheel covers) among many other things.
*The cars pictured below show special equipment such as trim, 2-tone paint, bumper wings and white wall tires. All these options were available to these specific models at moderate extra cost.