The Shelby Street Fighter Rampage Pickup was based on the 1983 Rampage 2.2 pickup. This concept vehicle featured air dam, ground effect skirts, spoiler, and unique paint and tape treatment. A special four-color version of the Dodge Truck’s Ram’s head logo dominated the hood scoop. The design concept was an adaptation of the 1983 ½ Dodge Shelby Charger, inspired by sports car driver, designer, and builder Carroll Shelby.
Two were actually built by Shelby, but they were never sold, with one of them going to the designer of the car. The project was scrapped, along with the Dodge Rampage production.
Source: Dodge Public Relations & Dodge-Wiki