The 1971 season saw a major skirmish in the battle between 12-cylinder rearguards BRM, Ferrari and Matra against the ever growing ranks of teams using the lighter and cheaper Ford DFVs. Ferrari’s aging flat-12 powered 312 earned debutant Mario Andretti a welcome win in the first race of the season, but once ‘69 world champion Jackie Stewart found his stride with the monocoque Tyrrell-Ford 003, there wasn’t too much joy for fans of the big twelves. As the season progressed, Stewart and Tyrell de...