Built on the Valiant’s chassis and bringing a 273-cubic-inch V8 engine, what truly made the ’64 Barracuda unique was its fastback styling and enormous wrap-around rear window.
Although the Valiant would never be named a peak muscle car, it had the option for a 235 horsepower 273 cubic inch V8 engine that was much more affordable than others.
A lesser-known Plymouth model, the 1971 Duster had a 340 cubic inch V8 engine that could produce nearly 300 horsepower and cost less than other muscle cars.
The Duster was in production from 1970 to 1976, but it lost much of its power due to new emissions standards and the auto industry-wide move towards unleaded gasoline after 1972.
Although there was a shift toward eco-friendly emission standards, the 1971 GTX seemingly went all out on the specs before the new regulations took place.
The racing version needed to be more agile, but it still sported a 440-horsepower 305-inch V8. However, the most powerful version featured the iconic 455-horsepower 426 Hemi V8.