| 1st | 1 | Jacky Ickx / Jochen Mass | Porsche 935 | Martini Racing Porsche System | 1:48.2890 |
| 2nd | 8 | Reinhold Jöst / Bob Wollek / Albrecht Krebs | Porsche 935 | Porsche Kremer Racing | 1:49.0990 |
| 3rd | 20 | Jean Rondeau / Jean-Pierre Beltoise | Inaltera Ford | Inaltera Motors | 1:52.7200 |
| 4th | 21 | Christine Beckers / Lella Lombardi | Inaltera Ford | Inaltera Motors | 1:54.2620 |
| 5th | 3 | Martino Finotto / Carlo Facetti / Romeo Camathias | Porsche 935 | Jolly Club | 1:55.0470 |
| 6th | 00 | Danny Ongais | Porsche 911 Carrera RSR Turbo | Interscope Racing | 1:56.7380 |
| 7th | 61 | Peter Gregg / Jim Busby | Porsche 934 | Brumos Racing | 1:56.8940 |
| 8th | 14 | Al Holbert / Michael Keyser / Claude Ballot-Léna | Chevrolet Monza | Dickinson/Holbert Racing | 1:57.4170 |
| 9th | 47 | John Fitzpatrick / Kenper Miller / Paul Miller | BMW 3.5 CSL | KWM Racing | 1:58.0420 |
| 10th | 05 | Jim Trueman / Jerry Thompson / Don Yenko | Chevrolet Monza | Red Roof Inns, Inc. | 1:59.7280 |
| 11th | 55 | Rick Thompkins / Dave Heinz / Lamar Mann | Chevrolet Corvette | Rick Thompkins | 2:01.3990 |
| 12th | 43 | Hurley Haywood / John Graves / Dave Helmick | Porsche Carrera RSR | Ecurie Escargot | 2:01.4990 |
| 13th | 41 | Herb Jones, Jr. / Steve Faul | Chevrolet Camaro II | Jones Ind. Racing | 2:02.0700 |
| 14th | 96 | Gene Felton / Buzz Cason / James Reeve | Chevrolet Camaro | Clay Young | 2:02.4870 |
| 15th | 78 | Babe Headley / Sam Feinstein | Chevrolet Corvette | Babe's Garage | 2:02.7910 |
| 16th | 24 | Tom Frank / Carl Shafer | Porsche Carrera RSR | Executive Industries | 2:02.8450 |
| 17th | 63 | Ted Field / Jon Woodner | Porsche 911 Carrera RSR 3.0 | Interscope Racing | 2:02.8930 |
| 18th | 58 | Diego Febles / Mandy Gonzalez / Hiram Cruz | Porsche 911 Carrera RSR | Diego Febles Racing | 2:03.0100 |
| 19th | 2 | David Hobbs / Ronnie Peterson / Sam Posey | BMW 320 | BMW Motorsport GmbH | 2:03.0310 |
| 20th | 99 | Phil Currin / Rob Hoskins / Peter Knab | Chevrolet Corvette | Phil Currin | 2:03.5970 |
| 21st | 30 | George Dyer / Brad Frisselle | Porsche 911 Carrera RSR 3.0 | George Dyer | 2:04.4100 |
| 22nd | 64 | Elliot Forbes-Robinson / Paul Newman / Milt Minter | Ferrari 365 GTB/4 | Ramsey Ferrari/Modena | 2:05.0590 |
| 23rd | 77 | Burt Greenwood / Rick Mancuso / John Cargill / Dave Heinz | Chevrolet Corvette C3 | Mancuso Chevrolet | 2:05.7690 |
| 24th | 65 | Bobby Carradine / John Morton / Roy Woods | Ferrari 365 GTB/4 | Ramsey Ferrari/Modena | 2:06.0030 |
| 25th | 72 | Bill Arnold / Carl Thompson / Billy Hagan | Chevrolet Corvette | Bill Arnold Racing | 2:07.5790 |
| 26th | 9 | Klaus Bytzek / Harry Bytzek / Rudy Bartling | Porsche Carrera RSR | Bytzek Automotive Design | 2:08.6820 |
| 27th | 79 | Michael Callas / Jerry Jolly / Pierre Laffeach / Peter Papke | Porsche 911 Carrera RSR 3.0 | Michael Callas | 2:09.3410 |
| 28th | 80 | Carm Solomone / Fred Lang | Chevrolet Camaro | Carmon Solomone | 2:10.0290 |
| 29th | 66 | Tony Adamowicz / John Cannon / Dick Barbour | Ferrari 365 GTB/4 | Ramsey Ferrari/Modena | 2:10.3060 |
| 30th | 70 | Adrian Gang / W. K. Gonzalez / Tim Duke | Porsche Carrera RSR | Michael Callas | 2:10.7150 |
| 31st | 42 | Bob Hindson / Frank Carney / Dick Davenport | Porsche 911 S | Bob Hindson Racing | 2:11.2080 |
| 32nd | 46 | Mauricio DeNarvaez / Albert Naon / John Freyre | Porsche 911 Carrera RSR | Mauricio de Narvaez | 2:12.0310 |
| 33rd | 10 | M. L. Speer / Windle Turley / Hal Sahlman | Porsche 911 S | M. L. Speer | 2:12.2940 |
| 34th | 48 | Luis Sereix / John Carusso / Emory Donaldson | Chevrolet Corvette | Autodyne | 2:12.3590 |
| 35th | 38 | John Paul / John O'Steen / Bob Hagestad | Porsche Carrera RSR | John Paul | 2:12.4560 |
| 36th | 60 | Rusty Bond / Ren Tilton / John Thomas | Porsche 911 S | R & R Racing | 2:13.9000 |
| 37th | 07 | Charles Mendez / Dave Cowart / Dave Panaccione | Porsche 911 T | Charles Mendez | 2:13.9180 |
| 38th | 51 | Robert Kirby / John Hotchkis | Porsche 914/6 | Kirby Hitchcock Racing | 2:13.6660 |
| 39th | 39 | Wiley Doran / Jim Barnett / Charles Pelz | Chevrolet Corvette | Wiley Doran | 2:15.3650 |
| 40th | 71 | John Higgins / Chip Mead / Dave White | Porsche 911 | The Foreign Exchange | 2:18.0410 |
| 41st | 28 | Richard Weiss / Bill Alsup / Raymond Gage | Porsche 911 S | Weiss Motor Racing | 2:19.2230 |
| 42nd | 01 | Bob Bergstrom | Porsche 911 S | Sports Ltd. Racing | 2:19.3350 |
| 43rd | 34 | George Drolsom / Bill Scott / Tom Bagley | Porsche 911 S | Drolsom Racing | 2:21.8180 |
| 44th | 02 | Al Levenson / Dan Rice / Guido Levetto | Chevrolet Corvette | Al Levenson | 2:22.5790 |
| 45th | 18 | Jack Swanson / Terry Wolters | Chevrolet Camaro | Terry Wolters | 2:22.5820 |
| 46th | 33 | Ara Dube / Harro Zitza / Joe Castellano | Porsche 911 | Ara Dube | 2:23.0330 |
| 47th | 84 | Russ Boykin / Sam Henderson | Chevrolet Camaro | Lenton B. McGill | 2:23.1740 |
| 48th | 49 | Sam Fillingham / Mike Williamson / K. P. Jones | Chevrolet Corvette | Fillingham Racing | no time |
| 49th | 73 | Clark Howey / David Crabtree / Dale Koch | Chevrolet Corvette C2 | Howey Farms | no time |
| 50th | 6 | Amos Johnson / Dennis Shaw / Steve Anderson | AMC Gremlin | Levi's Team Highball | no time |
| 51st | 27 | Ray Mummery / Jack Refenning / Ralph Noseda | Porsche 911 S | SVD Automotive | no time |
| 52nd | 50 | Tom Waugh / John Rulon-Miller / Bob Punch | AMC Hornet | Tom Waugh | no time |
| 53rd | 13 | Bob Fryer / Richard Bostyan / Ed Lowther | AMC Javelin | University of Pittsburgh | no time |
| 54th | 7 | Anatoly Arutunoff / José Marina / Brian Goellnicht | Lancia Stratos | Hallet Motor Racing Circuit | no time |
| 55th | 03 | Bruno Beilcke | BMW 2002 | Bavarian Motors | no time |
| 56th | 98 | Ralph Tolman | Lotus Europa | Ralph Tolman | no time |
| 57th | 36 | Bill Boye / Jere Gillan | AMC Gremlin | Bill Boye | no time |
| 58th | 17 | Vince Gimondo | Chevrolet Nova | Tim Chitwood | no time |
| 59th | 40 | Andre Sepelon / Bob Lee / Larry Parker | Ford Mustang | Robert V. LeMay | no time |