 In 1968 the take over of Rootes by Chrysler, tougher competition and changes in the rules severely limited the Fraser Imp team's activities and success.After venturing into Formula 5000 in 1969 and 1970, Fraser retired from racing, moving to Tenerife.Unett went on to race in the single seat Imp powered Vixen cars that dominated the BP Formular 4 championship in 1968, the Vixens winning the first 6 places, With Unett winning the BP title.