not be sold in the US as a commercial vehicle after 1964, due to the Chicken tax. Mechanical The engine, gearbox and many smaller parts are shared with other Citroën models. The engine and gearbox are nearly identical to those in the Traction Avant and later the DS, only mounted with the engine in front of the gearbox. The headlights were identical to those of the 2CV, while speedometers were successively borrowed from the Traction Avant and the Ami 6. While the derated "Traction Avant" 4-cylinder engine and the unsophisticated 3-speed gearbox (non syncromesh on first gear) offered only a modest top speed of just under 100 km/h, the chassis and suspension layout provided good roadholding qualities for a van of the era, especially on the short wheelbase version: low slung chassis, with very little overhangs, combined with sophisticated totally independent suspensions (the front ones used double torsion bars instead of conventional coil springs). The 1.9 litre engine offered more usable power than the 1.2 litre of its competitor, the 1950 Volkswagen Type 2. Diesel engines were also available, initally from Perkins, later from . Styling changes The basic design changed very little from 1947 to 1981. Vehicles left the Citroën factory with only three body styles: the standard enclosed van, a pick-up version, and a stripped-down body which went to non-Citroën coach-builders and formed the basis for the cattle-truck and other variants. The basic version had an overall length of 4.26m, but vehicles were also available in a LWB version with an overall length of 5.24m. In September 1963 the earlier style rear window - a narrow vertical window with curved corners - was replaced with a square window the same height but wider, 45 cm on each side. The bonnet was modified to give two additional rectangular air intakes at the lower edges, one for a heater, the other a dummy for symmetry. In early 1964, the split windscreen used since 1947 was replaced with a single windscreen, while in late 1964 the chevrons on the radiator grille, previously narrow aluminum strips similar to those on the Traction Avant, were replaced with the shorter, pointed style of chevrons as used on most Citroën vehicles in the last decades of the twentieth century. In November 1969 the small parking lights were discontinued, the front indicators were recessed into the wings, and the shape of the rear wings was changed