Rubuta ci gaba don wannan sakin layi - Rukunin injin na Mustang bai isa ba don saukar da babban injin Boss 429, don haka Ford ya yi kwangila tare da Kar Kraft na Dearborn, Michigan, don gyara 4-gudun Cobra Jet Mustangs don karɓar shi. Kar Kraft wata cibiyar gwaji ce ta Ford wacce ta yi aiki a matsayin Injiniyan Motoci don Motoci na Musamman na Ford. Kar Kraft a baya ya ci gaba da farko GT40 MKII (lashe na 1966 24 Hours na Le Mans
) da kuma tsara da kuma gina GT40 MKIV (lashe na 1967 24 Hours na Le Mans).