The 1970 GSX was built atop the already potent Buick GS 455 big-block coupe. The GSX was officially quoted as having 360 horsepower and a monumental 510 lb-ft of torque, although like many muscle cars, these power figures were underrated. This 1970 coupe made a strong statement about GM’s new willingness to go over its previous 400-cubic-inch limit, and it was available only in yellow or white, both with...
