Ferrari stayed absent in protest, while old 5-litre Ford GT40 as well as Lola and some others makes could still enter as sportscars if at least 50 cars had been built.
For the 1968 season, three “lightweight” GT40’s were built to compete for the 1968 season using information, and materials learned from their first internally built race car, the Mirage M1, including a reconfigured front bulkhead, wider wheel arches front and rear, and carbon fiber.
Porsche's only non-top-two-finish came at the third-to-last round, 6h at Watkins Glen, where no less than four factory 908 were entered in an all-in attempt to secure the championship ahead of the insignificant half-point Zeltweg and the all-important Le Mans.
‡ - The 24 Hours of Le Mans was originally scheduled to be run 15 June and 16, but was delayed due to a workers strike in France.
Points were awarded for Group placings gained by the top six GT finishers at each round in the order of 9-6-4-3-2-1.
Only the best 5 round results for each make counted towards the title, with any other points earned not included in the total.