This is the start of the 1967 24 Hours of Le Mans.
First six cars pictured [Number - Car - Drivers]:
1 - Ford GT40 MK IV - Dan Gurney, A. J. Foyt (Overall winner)
7 - Chaparral 2F - Phil Hill, Mike Spence (Did not finish)
3 - Ford GT40 MK IV - Mario Andretti, Lucien Bianchi (Did not finish)
4 - Ford GT40 MK IV - Denny Hulme, Lloyd Ruby (Did not finish)
5 - Ford Mk IIB - Roger McKlusky, Frank Gardner (Did not finish)
6 - Ford Mk IIB - Jo Schlesser, Guy Ligier (Did not finish)

Top Five Finishers:

1 - United States Ford Motor Company | United States Shelby-American Inc. | United States Dan Gurney, United States A. J. Foyt | Ford Mk IV, Ford 7.0L V8 | 388 laps

2 - Italy SpA Ferrari SEFAC | Italy Ludovico Scarfiotti | United Kingdom Mike Parkes | Ferrari 330 P4, Ferrari 4.0L V12 | 384 laps

3 - Belgium Equipe Nationale Belge | Belgium Willy Mairesse, Belgium “Beurlys” (Jean Blaton) | Ferrari 330 P4, Ferrari 4.0L V12 | 377 laps

4 - United States Ford Motor Company |United States Shelby-American Inc. | New Zealand Bruce McLaren,
United States Mark Donohue | Ford Mk IV, Ford 7.0L V8 | 359 laps

5 - Germany Porsche System Engineering | Switzerland Jo Siffert, Germany Hans Herrmann | Porsche 907 langheck, Porsche 1991cc F6 | 358 laps

Its a Chaparral.

1967/8 Le mans ?