 One of the cars from this design project actually became known as Allegro.The four-seater Mustang was known beforehand to be the car that would actually be produced for sale using the first generation Ford Falcon platform.Based on a four-seater configuration and using a front-engine layout based on the Falcon, the Mustang II was much more conventional in design and concept and closely resembled the final production variant that would appear in 1964.