This was the last championship season to include a hill climb event, due to safety concerns.
Also, growing speed at Le Mans caused a controversial CSI decision to limit the engine capacity of Group 6 Sports-Prototypes to 3 litres, beginning in 1968.
All championships scored points to the top six competitors in each class, in the order of 9-6-4-3-2-1.
[4] As the CSI declined and Ford had no realistic chances to defend the championship without those points, Ford concentrated the solely on Le Mans and did not send its prototypes to the Nurburgring or Brands Hatch events.
Not all race results could be counted towards the championship totals and discarded points are shown within brackets in the table below.