panels were used for doors, bonnet and boot. Lightweight casings were fitted to gearbox and differential. All the Lotus factory cars were painted white with a green stripe (although Ford built some for racing in red, and one customer had a dark blue stripe due to being superstitious about green). The cars also received front quarter bumpers and round Lotus badges were fitted to rear wings and to the right side of the radiator grille. Interior modifications were limited to a centre console designed to accommodate the new gear lever position, different seats and the later style dashboard, featuring tachometer, speedometer, oil pressure, water temperature and fuel level gauges. A wood-rimmed steering wheel was fitted. The suspension changes to the car were quite extensive; the car received shorter struts up front, forged track control arms and 5.5J by 13 steel wheel rims. The rear was even more radical with vertical coil spring/dampers replacing the leaf springs and two trailing arms with a A- bracket (which connected to the differential housing and brackets near the trailing arm pivots) sorting out axle location. To support this set-up, further braces were put behind the rear seat and from the rear wheelarch down to chassis in the boot. The stiffening braces meant that the spare wheel had to be moved from the standard Cortina's wheel well and was bolted to the left side of the boot floor. The battery was also relocated to the boot, behind the right wheelarch. Both of these changes made big improvements to overall weight distribution. Another improvement the Cortina Lotus gained was the new braking system ( front discs) which were built by brake specialist Girling. This system also was fitted to Cortina GTs but without a servo, which was fitted in the Cortina Lotus engine bay. Initially, the engines were built by J. A Prestwich of Tottenham and then Villiers of Wolverhampton. In 1966, Lotus moved to Hethel in Norwich where they had their own engine building facilities. The Cortina Lotus used a diaphragm-spring clutch, whereas Ford fitted coil-spring clutches to the rest of the range. The remainder of the gearbox was identical to the Lotus Elan. This led to a few problems because although the ultra-close gear ratios were perfect for the race track or open road, the clutch was given a hard time in traffic: the ratios were later changed. The early cars were very popular