Who was the Formula One racing driver's champion in 1963 and 1965?

Question

In what vehicles did Australian Formula One World Champion and founder of the Brabham racing team and race car constructor, Sir John (Jack) Brabham, have his early racing experience?

Answer 1

Jim Clark
Clark was Scottish. He competed in sports cars, touring cars and in the Indianapolis 500, which he won in 1965, as well as in Formula One. He was killed in a Formula Two racing accident in 1968 in Hockenheim, West Germany, when he was 32. At the time of his death, he had won more Grand Prix races (25) and achieved more Grand Prix pole positions (33) than any other driver.