Buick Gran Sport

The 1965 Skylark Gran Sport was the intermediate Buick Skylark with the Gran Sport option added. Although a 300 cu in (4,916 cc) V8 was already offered in the Skylark, the Gran Sport had the largest engine permitted by GM - a 400 cu in (6,555 cc) Buick V8. This engine was actually 401 cu in (6,570 cc), but called a "400" by Buick because that was the maximum engine size limit set by General Motors for the intermediate body cars.