 In 1973, Clark led the East African Safari Rally by over an hour, when forced to retire at the halfway stage with a disintegrating car.As part of his later extended works-deal with Ford, Clark was contracted and paid as a development driver, for which he was asked to rally unusual models.These development excursions included rallying a Ford Zodiac in Eastern Europe, a Ford Capri in the Tour of Britain; and a Ford Escort attached to a Sprite Alpine to compete in the RAC and Caravan Club organised Caravan Rally of Great Britain, centred around Silverstone Circuit.