|The '70 Gran Sport became its own series.
1970 Buick Gran Sport
Many Buick performance fans consider 1970 as the greatest year for Buicks 455 engine as it was the most powerful engine Buick built. General Motors lifted it's corporate ban of engines larger than 400 cubic inches in an intermediate body, and Buick quickly responded by adding the brand new 455 cubic inch engine into its restyled GS. The 455 boosted more displacement, bigger valves, and a hotter cam and included standard cold air induction through functional hood scoops. The 455's was rated at 350hp and a pavement pounding 510lb-ft of torque. The Stage 1 package, was even more with a hotter cam, bigger valves, and a revised carburetor. Buick rated it at 360hp, but most testers believed it was more than 400hp.
1970 Buick Gran Sport Production
||Body Type & Seating
|Gran Sport Series
||2 dr Hardtop Coupe - 6P