The end of production of the Falcon in the US paved the way for much greater Australian input in the design of Australian-made Falcons, from 1972 onwards, although for several years a distinct resemblance to the US-made Mustang still existed. The XA Falcon, introducing a new hardtop coupe model, entered the scene with its distinctive range of paint colours, with purple and wild plum being popular, often ordered with white or black upholstery. The XA Falcon Hardtop bore a strong resemblance to the 1970–71 Ford Torino SportsRoof (both cars shared the same floor sheet metal), and shared its "frameless window" doors with the utility and panel van variants. The drivetrains carried over from the XY, although the 250-2V was soon dropped, and the 'full-house' GT-HO engines no longer required due to changes in production racing regulations. Ford had planned a 'Phase IV' GT-HO (and built four), but cancelled it in the wake of the so-called 'Supercar scare'.