Claim: Representing United Kingdom, Jackie Stewart together with Tyrrell-Ford as his constructor, garnered a lap time of 1:17.8 in the 1971 South African Grand Prix at Kyalami Circuit on 6 March 1971.
Evidence: United_Kingdom Jackie Stewart Tyrrell-Ford 1:17.8 The 1971 South African Grand Prix, formally the Fifth AA Grand Prix of South Africa (Afrikaans: Vyfde AA Suid-Afrikaanse Grand Prix), was a Formula One motor race held at Kyalami Circuit on 6 March 1971.