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  1. 1967 Buick Gran Sport Catalog and Classic Car Guide, Ratings and ...

  2. 1970 Buick Gran Sport Catalog and Classic Car Guide, Ratings and ...

  3. 1967 Buick Mid-Size Cars Fact Sheet - Over-Drive Magazine

  4. 1970 Buick Gran Sport GS455 Convertible - CLASSIC.COM

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    Starting in 1967, Buick made the Gran Sport its own model, still based on the Skylark. Buick named the new model the GS, and further used each model’s V8 engine’s displacement as a further identifier. At first, there was the GS 340 and GS 400, until the 340 V8 shifted to the new 350 V8 platform in 1968.
    Buick produced the GS California and GS Colorado from 1968–1969, as options for the GS 350s. These included an optional different transmission, unique badging, a deluxe steering wheel, and they were only available in each respective state.
    Following Pontiac's resounding success with the Tempest/LeMans-based GTO, Buick decided to enter the muscle car arena with a beefed-up version of its new intermediate. Thus, in the middle of the 1965 model year, the Skylark Gran Sport was born. Aesthetically, the Gran Sport wasn't much different from the top-of-the-line Skylark.
    The Buick Stage 2 GS was a planned factory option for the 1970 Buick GS 455 that never panned out. It consisted of a 450+ horsepower version of the Buick 455 V8, but never officially released. However, buyers could still get the Stage 2 parts from certain dealers and install them, to have unofficial Stage 2 Gran sports.
  6. 1970 Buick GS Stage 1 Sport Coupe - CLASSIC.COM

  7. 1970 Buick Gran Sport: A Masterpiece on Wheels and Its Enduring …

  8. Rare 455 V8 Project: 1970 Buick GS Stage 1 | Barn Finds

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