| 1st | 2 | Henri Pescarolo / Gérard Larrousse | Matra-Simca MS670C | Equipe Matra | 1:43.6980 |
| 2nd | 1 | Jean-Pierre Jarier / Jean-Pierre Beltoise | Matra-Simca MS670C | Equipe Matra | 1:43.8930 |
| 3rd | 60 | Arturo Merzario / Mario Andretti | Alfa Romeo T33/TT/12 | Autodelta | 1:44.1480 |
| 4th | 9 | Herbert Müller / Gijs van Lennep | Porsche 911 Carrera RSR Turbo | Martini Racing/Porsche System | 1:53.7600 |
| 5th | 16 | Dennis Aase / Scooter Patrick | Porsche 908/02 Flunder | Aase Brothers | 1:56.2910 |
| 6th | 59 | Peter Gregg / Hurley Haywood | Porsche 911 Carrera RSR 3.0 | Brumos Porsche-Audi Corp. | 1:56.4790 |
| 7th | 14 | Al Holbert / Elliot Forbes-Robinson | Porsche 911 Carrera RSR 3.0 | Holbert's Porsche-Audi | 1:57.3870 |
| 8th | 13 | Warren Agor / Paul Nichter | Chevrolet Camaro II | Warren Agor Racing Enterprises | 1:57.7470 |
| 9th | 42 | George Follmer / Brett Lunger | BMW 3.0 CSL | Hurtig Team Libra | 1:59.6300 |
| 10th | 5 | Michael Keyser / Milt Minter | Porsche 911 Carrera RSR 3.0 | Toad Hall Motor Racing | 2:00.4810 |
| 11th | 3 | Harry Theodoracopulos / Horst Kwech | Ford Capri RS 2600 | Harry Theodoracopulos | 2:00.3450 |
| 12th | 95 | Skip Barber / Bob Hagestad | Porsche 911 Carrera RSR 3.0 | Robert Hagestad | 2:00.3140 |
| 13th | 99 | Bob Fisher / Michel Dupont | Chevron B23 Ford | Professional Racing Associates | 2:01.8220 |
| 14th | 24 | John Buffum / George Follmer / Brett Lunger | BMW 3.0 CSL | Hurtig Team Libra | 2:01.8500 |
| 15th | 74 | Ludwig Heimrath / Jim Cook | Porsche 911 Carrera RSR 3.0 | Heimrath Turbo, Inc. | 2:02.9200 |
| 16th | 36 | Paul Miller / Kenper Miller | Chevrolet Camaro | Miller Brothers Racing Enterprises | 2:03.1980 |
| 17th | 34 | Sam Posey / David Hobbs / Elliot Forbes-Robinson | Porsche Carrera RSR | Ted Trudon Porsche - Audi, Inc. | 2:03.7020 |
| 18th | 65 | Jacques Bienvenue / Marc Dancose | Porsche Carrera RSR | Jacques Bienvenue | 2:04.1930 |
| 19th | 82 | Nestor Garcia-Veiga / Mark Waco / Angel Monguzzi | Ferrari 365 GTB/4 | Francisco Mir Racing Team | 2:05.2470 |
| 20th | 110 | Bob Mitchell / Tom Nehl | Chevrolet Camaro | Bolus & Snopes, Ltd. | 2:05.5510 |
| 21st | 88 | Tony DeLorenzo / Maurice Carter | Chevrolet Camaro II | Mo Carter Firestone Performance Centre | 2:05.6690 |
| 22nd | 43 | John O'Steen / John Graves / Dave Helmick | Porsche 911 Carrera RS | International Performance Center, Inc. | 2:06.1410 |
| 23rd | 55 | Mike Hiss / Alain Cudini | Ferrari 365 GTB/4 | North American Racing Team | 2:07.9630 |
| 24th | 30 | Alex Davidson / Gary Witzenburg | Chevrolet Corvette C3 | Davidson Racing | 2:08.4060 |
| 25th | 91 | Roger Pierce / Doug Mills | Chevrolet Corvette C3 | Roger Pierce Racing | 2:08.4400 |
| 26th | 57 | Bob Grossman / Gregg Young / Teodoro Zeccoli | De Tomaso Pantera | F. J. Maka Racing | 2:09.0610 |
| 27th | 86 | Hugh Kleinpeter / Ron Goldleaf | De Tomaso Pantera | Promotional Advertising Corp. | 2:09.1160 |
| 28th | 25 | Bert Everett / John Morton | Alfa Romeo Montreal | Bobcor | no time |
| 29th | 46 | Craig Carter / David Laughlin | Chevrolet Camaro II | Craig Carter Racing | 2:10.7260 |
| 30th | 92 | Dieter Oest / Mike Tillson / Lou Higgins | Porsche Carrera RSR | Oest-Tillson Racing | 2:11.9950 |
| 31st | 87 | Thomas Rynone / Michael Wiernicki / Neil Wiernicki | Chevrolet Corvette C3 | Rynone Industries | 2:12.0790 |
| 32nd | 64 | Bob Baechle | Chevrolet Corvette | C. Weaver Chevrolet | 2:13.1450 |
| 33rd | 39 | Gerre Payvis | Ford Mustang | Gerre Payvis | 2:14.1890 |
| 34th | 61 | Michael Oleyar / Sam Feinstein | Chevrolet Corvette | Feinstein Racing Enterprises | 2:32.0220 |