The rain stayed for virtually the rest of the race, dramatically slowing the pace, negating the speed of the 936s coming back through the field.
Both Gelo cars retired with mechanical issues in the soggy dawn, and when the Wollek/Haywood Porsche developed a bad misfire soon after it looked like the Kremer 935 of Klaus Ludwig and the Whittington brothers had the race covered.
FISA President, Jean-Marie Balestre was committed to bringing Le Mans back into the World Championship, but for now the Automobile Club de l'Ouest (ACO) chose to remain independent.
Two cars were built, with the original tested at the Fuji Speedway then debuted at the World Championship round at Silverstone It was driven by Chris Craft (also from De Cadenet) and Gordon Spice.
Having lost his regular co-driver Chris Craft to the Dome team, De Cadenet now got local Le Mans professional François Migault in his stead.
Rondeau attracted veteran French drivers Henri Pescarolo and Jean-Pierre Beltoise for one car, and rally specialists Jean Ragnotti and Bernard Darniche, while he himself raced the GTP entry with Jacky Haran.
The silhouette design by John Gentry was based on the BMW M1, but as less than 400 cars had yet been built, it could not run in Group 5, nor would IMSA allow it into the GTX category.
The car would be raced by BMW works driver Dieter Quester, alongside Ian Grob and Guy Edwards who had paired up last year with the disappointing Ibec project.
[14][1][15] Once again, there was a big field for the 2-litre category with fifteen entries, dominated as usual by Lola and Chevron, and using a mix of ROC, Cosworth or BMW engines.
Another Chevron (with a Brian Hart-prepared Cosworth engine) was entered by the Scottish Mogil Motors team of Tony Charnell, Robin Smith and Richard Jones.
The latter was the other big-name celebrity in the race, as the drummer for British band Pink Floyd (and avid Ferrari collector), though his status was overshadowed by Paul Newman.
[17] For several seasons, Jörg Obermoser had shown success with his ToJ cars in Europe, yet this was the first year they were seen at Le Mans with Frenchman Hubert Striebig entering his BMW-powered SC206, partnered with Alain Cudini and Hughes Kirschoffer.
[21] Kremer Racing entered three cars: two of the new K3s for team leader Klaus Ludwig, joined by the wealthy Whittington brothers (Don and Bill), former motocross riders from Florida[18] in one, and DRM regulars Axel Plankenhorn and "John Winter", with Philippe Gurdjian in the other.
Dick Barbour returned to Le Mans, this year with four Porsche 935s set up to the IMSA specifications, including one of the 1979 twin-turbo models.
In a major publicity coup he scored two big signings as drivers: Rolf Stommelen was not needed by the Porsche works team this year.
The other was the 54-year old actor Paul Newman, one of the biggest names in Hollywood of the time and nicknamed Cool Hand Luke after his character in the 1967 film.
[22][1] But Newman was no part-time gentleman-driver; having been a class-winning champion in the amateur SCCA[22][5] Barbour's second car had the Sebring-winning trio of Bob Akin, Rob McFarlin and Roy Woods[23] Two other 935s were in the IMSA class: a privateer effort from Formula 1 driver Jean-Pierre Jarier and Ted Field's Interscope team who had, with Danny Ongais and Hurley Haywood, won the Daytona 24 hours earlier in the year.
[25] Hervé Poulain, French art-auctioneer, had presented the world with a successive series of BMW Art Cars at Le Mans.
Ickx recorded his time of 3:31.4 on Thursday before Brian Redman missed a gear-change and over-revved the engine, forcing the mechanics to do an engine-change before the race.
Modified wheel rims, fashioned overnight at Porsche's factory at Weissach, were also fitted to both cars as insurance against further sudden punctures.
[12] Craft had the Dome running seventh on the first lap, but pitted next time around with a fire caused by a distributor lead that had not been properly attached.
He spun the car to avoid the barriers, but had to crawl round most of a lap on the rim to get back to the pits where almost an hour was lost repairing the heavy damage to bodywork and one of the radiators.
Rebuilding the gearbox took four hours, and despite hard driving by Jaussaud and Hobbs, niggly issues meant they missed the minimum distance at half-time by three laps and were disqualified.
[6] Now joined by Schuppan they held the lead for a further three hours, until just before nightfall, until the perennial vibration issues of the Cosworth DFV caused exhaust problems, costing a half-hour in the pits.
[6] Then soon after midnight the clear weather of Saturday gave way to drizzle, then torrential rain that lasted all night dramatically slowing the race pace.
[21][29][9][32] An improbable Hollywood ending for Newman was on the cards until the team was foiled by an intransigent wheel-nut locking tight, forcing it to be sawn off and a complete hub replacement, taking 23 minutes (6 laps).
[22][29][9] The second K3, having driven back up the field to eighth after its engine fire was unlucky to have a driveshaft fail in the last hours that dropped them down to finish 13th.
But as "Motor" magazine put on their headline, it was "the day the winner came second":[34] the spectators' favourite, Paul Newman, had almost pulled it off and got the biggest ovation when he took the podium with his team-mates.
[35] The torrential rain in the second half of the race made it the slowest Le Mans since 1958; the total distance was down fully 17% on the previous year.
After the lead changed hands 12 times over the 6 hours, it ended with the same result for the same drivers, with the Ludwig and the Whittington brothers again beating home the Barbour/Stommelen/Newman car.