The GS was Buick’s intermediate offer that filled in for the role of the muscle car in the sixties and particularly early seventies when it got the 455-cube V8 ...
By mid-1961, GM's Buick, Oldsmobile, and Pontiac divisions had begun building ... engines larger than 430 cubic inches had been lifted. This paved the way at Buick for the Buick Skylark Gran Sport ...