Book excerpt: In 1964, Chrysler offered an optional V-8 with it's popular Dodge Valiant. Banking on the resulting success of this option package, Chrysler went on to release a decade worth of low-priced, high-performance muscle cars based on the "A-body" Valiant, including the Dodge Dart GT and GTS, the Swinger 340, and the Demon, as well as the Plymouth Duster. Today, these cars' phenomenal sales figures translate to a thriving Dart and Duster enthusiast scene. Color photography of restored and factory-original vehicles, along with archival black-and-white images, are accompanied by an authoritative history examining the development of the cars. In addition to model histories for each, there are in-depth discussions of vehicle design and production, driving impressions, accessories and options, popular performance upgrades of the period, and the cars' successful histories at the drag strip.