The year was actually 1969 and 25 Porche 917's were built to meet the homolocation requirements so the car could be reaced. They had only 4 weeks to build them. The 25 cars were lined up for inspection and the inspector was offered a ride in the car of his choice. It is a good thing he declined, because several of the cars were non functioning mock ups.
From Wikipedia:
When Porsche was first visited by the CSI inspectors only three cars were completed, while 18 were being assembled and seven additional sets of parts were present. Porsche argued that if they assembled the cars they would then have to take them apart again to prepare the cars for racing. The inspectors refused the homologation and asked to see 25 assembled and working cars.
On March 12, 1969, a 917 was displayed at the Geneva Motor Show, painted white with a green nose and a black No. 917. Brief literature on the car detailed a cash price of DM 140,000, approximately 16,000 at period exchange rates, or the price of about ten Porsche 911s. This price did not cover the costs of development.
On April 20 Porsche's head of motorsports Ferdinand Pich displayed 25 917s parked in front of the Porsche factory to the CSI inspectors. Pich even offered the opportunity to drive any of the cars, which was declined.[9]
