AEC Commercial AEC Mustang (model GM6RH) 1956 - 1961 ByTrucksplanet Published on 02.09.2019 Share Tweet In 1956, the updated model Mustang twin-steer front axles came to replace the Majestic model. It was equipped with a Park Royal cabin, as well as other trucks AEC of that period. Continue Reading Related Topics:aec, aec mustang