Taken from www.RedlineGrandPrix.com The real Ford J-Cars were the predecessors of the Ford GT40 Mk IV. Completed in March of 1966, the first J-Car (J-1) weighed just over 2,600 pounds and was powered by a 500 HP 427 c.i. engine. Although J-1 had the fastest times at the 1966 Le Mans trials, it was sidelined so that the Ford team could focus on their team of GT40 Mk II cars. This decision paid off with a 1-2-3 finish by Mk IIs at the 1966 Le Mans! A second J-Car (J-2), built to CanAm specifications, crashed at Riverside in August 1966, tragically killing driver Ken Miles. After extensive re-working of the chassis and development of a new body style, the J-Car officially became known as the GT40 Mk IV.