Rubuta ci gaba don wannan sakin layi - Don 1968, Cooper zai so ya shiga jerin gwano don Cosworth-Ford DFV, amma ya ji cewa haɗin da ke tsakanin British Leyland tare da Mini-Coopers ya sa wannan ba shi da kyau. Maimakon haka, an yi yarjejeniya tare da BRM don amfani da lita 3 na V-12, wanda aka fara tunaninsa a matsayin motar motsa jiki, amma BRM kanta za ta yi amfani da ita a 1968. An gina sigar da aka ɗan gyara ta T86 don sabon injin, wanda aka yi wa lakabi da T86B kuma an yi amfani da tsohon direban Ferrari Italiyanci Ludovico Scarfiotti da saurayi ɗan Ingilishi Brian Redman don tuƙi. Motocin sun yi nasarar kammala uku-huɗu a cikin Mutanen Espanya
da Monaco Grand Prix, galibi godiya ga rashin amincin gasar, amma sai aka kashe Scarfiotti yana tuka Porsche a hawa dutsen Rossfeld kuma Redman ya sami babban hatsari a Grand Prix na Belgium wanda ya fitar da shi daga cikin aiki na tsawon watanni. Cooper ya ci gaba da kakar wasa tare da tarin direbobi, wanda babu wanda zai iya yin wani abu daga T86B. A lokacin kakar, Cooper ya gina gyare-gyaren gyare-gyare, T86C, wanda aka yi niyya don ɗaukar Alfa Romeo 3-litta V-8 amma aikin ya mutu.