The premise was simple: Sidestep General Motors’ corporate edict that prevented engines larger than 330 cubic inches from being installed in intermediate cars by creating an option package for the mid-size Tempest two-door – one that included the big 389 cubic inch V8 found in Pontiac’s full-size line.
Additional features of the GTO package ran to three- and four-speed manual gearboxes, or a two-speed slush box, stiffer springs, a bigger front sway bar, seven-blade clutch fan, four-barrel carburetor, dual exhaust tips, twin non-functional hood scoops, wider wheels and
