1968 Buick Gran Sport sports car
The revitalize interest in the vehicle introduced two versions of the GS, the GS400 and GS340. The numbers in the name symbolized the cubic-inch size of the engine. The 401 cubic-inch engine was replaced by an improved 400 cubic-inch unit. Though slightly smaller in size, it was smoother, sportier, and more responsive than the power-plant it replaced and still produced the same 340 horsepower rating as its predecessor. The GS 340 was equipped with a 340 cubic-inch engine that produced 260 horsepower and 365 foot-pounds of torque. Performance and versatility continued with the introduction of a three-speed automatic gearbox; a three and four speed manual gearbox was also available. Sales held steady but below expectations, with production almost equal to the prior year.The chassis of the GS was revamped for 1968, becoming smaller in size. Though it became smaller its overall weight increased due to the design and materials used. The 400 cubic-inch engine remained the same while the 340 was enlarged to 350 cubic-inches. Power output rose to 280.
