into flames. Parkes and Guichet led most of the race in their Ferrari prototype, after taking the lead from John Surtees and Ludovico Scarfiotti. Parkes and Guichet placed 2nd to Surtees and Scarfiotti in a 620-mile race at the Nürburgring in May 1965. The winning pair led the full 44 laps. It was a 4th consecutive victory for Ferrari. Dan Gurney eclipsed the time of Parkes in the sole factory Ferrari in the final practice for the 1966 12 Hours of Sebring. The blue Ford was clocked at 2:54.6, 2 seconds faster than a lap run by Parkes the previous day. In a Ferrari P3 prototype, Parkes lap was so fast that none of the time-speed conversion charts would accept it. Parkes and Bob Bondurant started 2nd after Gurney and his co-driver, Jerry Grant. Surtees and Parkes were in a Ferrari prototype in their victory in a 620-mile Monza sports car event in April 1966. Chris Amon and Lorenzo Bandini were triumphant in a 100 lap, 1,000 kilometer Monza race in April 1967. They drove a four-litre Ferrari for an average speed of 122.30 m.p.h. Parkes and Scarfiotti finished second with a time of 5:10:59.2. The winning time was 5 hours seven minutes, 43 seconds. The Ferraris were in front after the Chaparrals of Phil Hill and Mike Spence had to make pit stops following the 17th and 18th laps. He finished second at the 1967 24 Hours of Le Mans, paired with Ludovico Scarfiotti, in a Ferrari 330P4. After the crash at the Spa Belgian GP 1967 Parkes returned to race sport cars events in 1970, with remarkable 4th place at the Daytona 24 hours on a Ferrari 312P entered by NART (paired with Sam Posey), at Sebring 12 hours he finished 6th on the same car (together with Chuck Parsons). He continued the season racing on the Filipinetti Ferrari 512S, reaching 5th place at the Targa Florio and 4th at the Nurburgring 1000 km together with Herbert Muller. Parkes competed in a 1,000 kilometer sports car race in Argentina in January 1971, he was just ahead of Ignazio Giunti's Ferrari 312PB when the Italian driver crashed on the Beltoise's Matra. He was paired with Joakim Bonnier in a five-litre Ferrari entered and owned by the Swiss Filippinetti stable which maintained operations in Modena. Parkes competed in the 1971 24 Hours of Le Mans in a modified Ferrari 512M