H.O. Homologated Options began in 1978 and was started in order to build the XD Phase 5 race cars. Wayne Draper who had worked at Ford creating many of the GTs had worked with Howard Marsden on the XY Phase III in 1970. Ford Motor Company Industrial Design 1970 - 1989. Ford Falcons XY to EB. GT HO Falcons XY to XD. Allan Moffat inspired FOrd for Ford fans.