The Business Coupe, which was the least produced model of Plymouth in 1958 (1,472 units), differed from the regular 2dr Club Sedan in that the rear seat was an optional accessory.

Based on a Plaza Club Sedan, the "Silver Special" had a custom paint job with silver paint on the roof and in the Sportone inserts plus a short stainless steel spear that accented the front fenders and extended partially into the front doors.

The final custom touch was on the rear fins where the Silver Special bore "Forward Look" emblems instead of the traditional "Plaza" scripts.

It is isn't known how many of the 94,728 Plazas produced in 1958 were fitted with the Silver Special trim package, but they are believed to be very rare cars.

Like most models of its kind in the 1950s and 1960s, the Plaza—with its minimal trim and plain cloth-and-vinyl upholstery, and limited option choices—saw most of its appeal toward fleet buyers, such as police departments, where luxury and comfort were not primary concerns.