The ACO received 80 entries for the race, which it reduced to 63 for qualifying, though only 53 cars arrived to practice. Noticeable was the very low turnout from manufacturers’ works teams. Given the dominance of the big Sports Cars on fast tracks like Le Mans, there were few Prototypes entered. Ferrari and Alfa Romeo withdrew their works teams to concentrate on next year's models. However, a vast fleet of privateer Porsche 911s arrived to fill the gap, making the GT category the strongest-supported group.