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The Ford GT40 is a high-performance mid-engined racing car originally designed and built for and by the Ford Motor Company to compete in 1960s European endurance racing and the World Sportscar Championship. Its specific impetus was to beat Scuderia Ferrari, which had won the prestigious 24 Hours of Le Mans race for six years running from 1960 to 1965. As rules of the time required that GT cars were built in dozens and sold, around 100 cars in total have been made, mostly as 289 cu in (4.7 L) V8-powered Mk Is, of which at least 50 were made in 1965, which allowed FIA-homologation[5] as Group-4-Sportscar for 1966 until 1971. This gave the old MK.I car of Gulf-Wyer the chance to enter and win Le Mans in 1968 and 1969 after prototypes had been limited to 3 litre, with the performance of the Ford 7-litre-V8 in the factory 1966 Mk.II and 1967 Mk.IV prototypes causing this rule change, which also banned the 4-litre V12 Ferrari 330P4 and others after 1967. The Mk.III designation was used for some road-legal cars. The Ford GT40 debuted in 1964, and improvements in 1965 led to Ford winning World Championships categories from 1966 to 1968. The first Le Mans win came in 1966 with three 427 cu in (7.0 L) powered Mk.II prototypes crossing the finish line together, the second in 1967 with the same engine now in quite different US-built Mk.IV prototype chassis similar to the "J-car" mule. In order to lower ever-higher race top speeds, a rule change from 1968 onwards limited prototypes to 3.0 litre Formula 1 engines; the sportscar "loophole", however, allowed the private JW "Gulf Oil" team to win at Le Mans in 1968 and 1969 running a Mk.I with a 5.0 litre engine. The GT40 effort began in Britain in the early 1960s when Ford Advanced Vehicles began to build the Mk I, based upon the British Lola Mk6, in Slough, UK. After disappointing race results, the engineering team was moved in 1964 to Dearborn, Michigan, US, to design and build cars by its advanced developer, Kar Kraft. All chassis versions were powered by a series of American-built Ford V8 OHV engines modified for racing. In the 1966 Le Mans, the GT40 Mk II car broke Ferrari's winning streak, making Ford the first American manufacturer to win a major European race since Jimmy Murphy's Duesenberg in the 1921 French Grand Prix.[6][7][8] In the 1967 Le Mans, the GT40 Mk IV car became the only car developed and assembled entirely (both chassis and engine) in the United States to achieve the overall win at Le Mans.[9]
