Ferruccio Lamborghini was always interested in engines, and he loved repairing any kind of vehicle. After World War II, he began to build tractors out of army surplus supplies. By 1960, his tractor company was building close to 400 tractors a month, and he was a very wealthy man. Lamborghini loved owning and driving sports cars. According to one story, he was inspired to build his own sports car, because a Ferrari that he owned had a weak clutch. He opened a new factory, and hired some successful engine builders. His first sports car was the Lamborghini 350 GT, which came out in 1964.