Like the musclecar era itself, the SCCA Trans-Am series reached its popularity in 1970. Trans-Am was known for top-name drivers and fender-banging competition. Chevrolet dominated the 1969 season, but Ford and AMC were back for more, and Dodge was in with factory-supported effort as well. This challenger was built by Dan Gurney's All American Racers and driven by Sam Posey. The Mopar Trans-Am cars ran 340 V-8s, destroked to 303 cubic inches to sneak in under the 5.0-liter limit. Horsepower was about 450, with weight around 3 00 pounds. Posey also raced in Formula 1, USAC, Can-Am, the Formula 5000 series, and at Sebring and Le Mans prior to his career as a racing commentator. This photo was taken during the season opener at Laguna Seca, where he finished sixth. The car's best results were a trio of thirds. The Challenger was never the successful Trans-Am racer the Camaro and Mustang were, but that doesn't keep it from being one of the muscle movement's most popular players-then or now.