Things were going swimmingly until the seventh hour, by which time 0868 was lying second. Hitting some debris punctured the radiator, but although promptly draining it of water, the number 25 car was able to hold its ground until the close of play, taking a well earned class victory for being the first open car home. Next on the calender was an outing to the Le Mans Trials in April where 0868 was joined by a second 312 P bearing chassis number 0870. However, with their Spyder bodies, both cars were seriously off the pace down the Mulsanne Straight and after setting some disappointing times, Ferrari decided he would fit both entries with Berlinetta bodies for the 24 Hour race that June. In the meantime, the factory team went to Britain for the BOAC 500-mile race at Brands Hatch where Amon took the lead early on after losing out to Siffert's Porsche in qualifying. But 0868 gradually lost ground after the Siffert Porsche recovered, a puncture relegating it to fourth while Porsche's filled the top three places.

Both Spyder's were on hand to contest the Monza 1000km race two weeks later, Amon putting 0870 on pole whilst Rodriguez started third in 0868. The Amon / Andretti car led on several occasions until it was eventually forced out by a crankshaft failure, Rodriguez coming off no better although in reality he did well to escape a nasty accident unscathed. After an off at Parabolica had caused some light damage, Rodrigiez was sent back out of the pits only for 0868's rear bodywork to come loose down the ultra fast main straight. The Brazilian was a passenger as his 312 spun off and went backwards into the safety barriers at high-speed, this car then being dismantled back at the factory never to race again. Subsequently, 0870 was the sole car entered for Spa's 1000km race, Rodriguez being joined by David Piper and qualifying fourth behind a Lola T70, Mirage M2 and Porsche 908.

Trucked back to the factory and freshened up, Luigi Chinetti took delivery of 0870 soon after and entered it under the banner of his North American Racing Team at the Bridgehamton Grand Prix in mid September. The Long Island race was round seven of the 1969 Can Am Championship and having been altered little since its Le Mans outing, Pedro Rodriguez started 0870 from 11th on the grid. Clearly the fastest 3-litre entry throughout, it looked as though a deserved class win wasn't going to happen when on the very last lap, Rodriguez had to make an emergency pit stop for fuel. The Porsche 908 Spyder of Tony Dean then swept past the pits just as Rodriguez was making his way out, but when Dean was subsequently slowed by a backmarker, the Brazilian took his opportunity, regained the class lead and finished fifth overall. That was that for 1969, Chinetti taking 0870 the short trip back to his warehouse in downtown New York where it was joined by 0872 before the end of the year.

0872 (the only 312 P to have originally been completed as a Berlinetta) was then modified with a roof blister to accomodate taller drivers. One of these was Mike Parkes, team manager for the works 312 programme, the Englishman being paired with Sam Posey for the opening race of 1970, Daytona's 24 Hours. Parkes qualified ninth, four places ahead of Piper and Adamowicz in 0870, but 0872 had to undergo lengthy repairs after being hit by a backmarker. The number 24 car fought back to fourth, Chinetti's sister entry taking fifth, this having been good enough for a class one-two. Indeed, with the arrival of Porsche 917's and the Ferrari 512 S, 312 P's were no longer in contention for outright wins and the Daytona result was about as good as Chinetti could have hoped for.

At Sebring, both cars qualified outside of the top ten for the first time, Luigi Chinetti Jr. and Tony Adamowicz being forced to retire by a faulty water pump after 56 laps. The Parkes and Parsons entry meanwhile made it to the end in sixth overall, 0872 finishing fourth in class behind the Steve McQueen / Peter Revson Porsche 908, a woks Alfa 33 and Matra's MS650. Both cars should have subsequently contested the Le Mans 24 Hours in June, but because a sponsorship deal fell through at the last minute, 0870, the Posey / Migault entry, was withdrawn after having already set a time good enough for 29th on the grid. It was bought that weekend by Pierre Bardinon and has resided in his collection ever since. 0872 did start though after qualifying a disappointing 28th, but things didn't improve much for it in the race. Plagued with electrical glitches caused by the dreadful weather, it was still running come 2pm on Sunday, but due to having covered insufficient distance, was not classified.

For 1971, Chinetti's solitary 312 P (0872) was put on a diet and re-bodied by Wayne Sparling who fitted a new open-topped shell that mimicked a 312 PB at the front and a short-tailed 512 S at the back. In this configuration, the car was raced twice more, its first outing coming at the 1971 Daytona 24 Hours where Chinetti Jr. and Nestor Garcia-Veiga ran third for much of the race, eventually finishing fifth overall and first in class. At Sebring, Chinetti Jr. was joined by George Eaton and they started the race in 15th. Making steady progress throughout the 12 hours, 0872 eventually place eighth overall. This was good enough for third in class, but Chinetti wanted more performance and set about building a new car for which he used a number of 0872's components. The suspension, steering, engine and gearbox were dropped into a brand new chassis known as the Chinetti Special. However, all the 312 P parts used for its construction were eventually re-united with the rest of 0872 during the early 1980's