In 1967 Crayford Engineering 'improved' a Vauxhall Viva SL90 2-door with aeroflow ventilation, greater sound insulation and a vinyl roof. Announced as the 'Viva Prince' it is thought that only one was ever made. That in turn got chopped to create the Vauxhall Viva Convertible which was launched in March 1968, adding £480 to the price of an £800 car. The hood mechanism was supplied by Karl Deutsch in Cologne, who also produced some of Crayford's design under licence, and the hood fabric was also sourced in Germany. Crayford followed up the Viva with a convertible version of the Vauxhall Cavalier MkI called the 'Centaur' in 1978, but Crayford sold the rights to Magraw Engineering who made 118 Vauxhalls including a few Opel versions too. Crayford did not win a contract to make the MkII Cavalier Convertible.