Unlike the Charger II of 1965, with which the Dodge stylists tested the public's response to a planned, similarly styled production car, the 1968 Charger III styling study was not meant for large-scale production.
Dodge did not intend to produce two-seater sports cars at the time. Instead, the Charger III served the purpose of presenting new styling elements and technical features, and it was "the aerodynamically most efficient car ever designed and built by Dodge," as the official announcement put it. An interesting feature: the complete cockpit roofing including the sides could be folded out and back again as in an aircraft cockpit.
Source: Dodge press