| 1st | 75 | John Greenwood / Vince Muzzin / Carl Shafer | Chevrolet Corvette C3 | John Greenwood | 1:55.2230 |
| 2nd | 25 | Ronnie Peterson | BMW 3.0 CSL | BMW of America | 1:56.7100 |
| 3rd | 24 | Sam Posey / Hans-Joachim Stuck | BMW 3.0 CSL | BMW of America | 1:57.2050 |
| 4th | 88 | Maurice Carter / Gene Felton | Chevrolet Camaro II | Carter Racing Services | 1:58.0890 |
| 5th | 14 | Al Holbert / Elliot Forbes-Robinson | Porsche 911 Carrera RSR 3.0 | Porsche-Audi USA | 1:58.4830 |
| 6th | 9 | Juan Carlos Bolanos / Hans Heyer / Michel Jourdain | Porsche Carrera RSR 3.0 | Juan Carlos Bolanos | 1:58.9520 |
| 7th | 59 | Peter Gregg / Hurley Haywood | Porsche 911 Carrera RSR 3.0 | Brumos Porsche | 1:59.0300 |
| 8th | 5 | Guillermo Rojas / Hector Rebaque / Fred van Beuren, Jr. | Porsche 911 Carrera RSR 3.0 | Hector Rebaque | 1:59.0300 |
| 9th | 18 | Jerry Thompson / Andrew Bach / Don Yenko | Chevrolet Corvette C3 | Jerry Thompson | 2:00.0350 |
| 10th | 43 | John O'Steen / Dave Helmick / John Graves | Porsche Carrera RSR | Escar | 2:00.0970 |
| 11th | 23 | Charlie Kemp / Carson Baird | Porsche 911 Carrera RSR 3.0 | Armor All | 2:00.3650 |
| 12th | 30 | Jacques Bienvenue / George Dyer | Porsche 911 Carrera RSR 3.0 | George Dyer | 2:00.5000 |
| 13th | 15 | Javier Garcia / George Garcia | Chevrolet Corvette C3 | Garcia Racing | 2:00.8560 |
| 14th | 27 | Jon Ward / Phil Henny / Dave Barnett | Chevrolet Camaro II | Jon Ward | 2:02.9230 |
| 15th | 87 | Tony DeLorenzo / Dick Brown / Maurice Carter | Chevrolet Camaro II | Carter Racing Services | 2:03.5280 |
| 16th | 11 | Michael Keyser / Billy Sprowls / Andres Contreras | Porsche 911 Carrera RSR 3.0 | Toad Hall | 2:04.0160 |
| 17th | 41 | Herb Jones, Jr. / Phil Currin / Steve Faul | Chevrolet Camaro II | Herb Jones, Jr. | 2:04.0500 |
| 18th | 1 | Claude Ballot-Léna | Ferrari 365 GT4/BB | North American Racing Team | 2:04.5260 |
| 19th | 69 | Steve Coleman / Amos Johnson | Chevrolet Vega | Coleman/Johnson | 2:05.2930 |
| 20th | 4 | Bill Webbe / George Dickinson / Harry Theodoracopulos | Porsche 911 Carrera RSR 3.0 | Bill Webbe | 2:05.9170 |
| 21st | 42 | John Carusso / Dick Vreeland | Chevrolet Corvette C3 | John Carusso | 2:06.1700 |
| 22nd | 71 | Jon Woodner / Fred Phillips | Ferrari 365 GTB/4 | North American Racing Team | 2:06.3070 |
| 23rd | 67 | David McClain / Dave White | Porsche 911 Carrera RSR | David McClain | 2:07.5940 |
| 24th | 0 | Milt Minter / Claude Ballot-Léna / Giancarlo Gagliardi | Ferrari 365 GTB/4 | North American Racing Team | 2:09.1230 |
| 25th | 13 | Randolph Townsend / John Thomas / Peter Papke | Porsche Carrera RSR | Randolph Townsend | 2:09.4900 |
| 26th | 17 | Vince Gimondo / Dave Heinz / Bert Everett | Chevrolet Camaro II | Takondo Racing | 2:11.0750 |
| 27th | 110 | Tom Nehl / Milton Moise | Chevrolet Camaro II | Automotive Engineering | 2:11.2060 |
| 28th | 95 | Ramon de Izaurieta / Sergio Tabe / Fidel Martinez | Porsche Carrera | Hector Rebaque | 2:11.3950 |
| 29th | 34 | George Drolsom / Bob Nagel | Porsche 911 S | George Drolsom | 2:12.4640 |
| 30th | 51 | Len Jones / Robert Kirby / John Hotchkis | Porsche 914/6 | Johnson-Bozzoni Porsche-Audi | 2:12.9460 |
| 31st | 32 | Dave Mroz / Richard Mroz | Ford Mustang | Roaring Moose | 2:13.1000 |
| 32nd | 60 | Rusty Bond / George Rollin / John Belperche | Porsche 911 S | Rusty Bond | 2:13.3240 |
| 33rd | 89 | Don Parish / Tom Countryman / Jim Secher | Porsche 911 S | Barrick Motor Racing | 2:14.0900 |
| 34th | 92 | Mike Tillson / Dieter Oest | Porsche Carrera RSR | Oest/Tillson | 2:14.3820 |
| 35th | 64 | C. C. Canada / Russ Boykin / Guido Levetto | Chevrolet Camaro I | Russ Boykin | 2:15.7150 |
| 36th | 73 | Bill Arnold / Bob Biernerth | Chevrolet Corvette C2 | Bill Arnold | 2:16.6480 |
| 37th | 85 | John Hulen / Ron Coupland / Nick Engels | Porsche 914/6 | John E. Hulen | 2:17.2770 |
| 38th | 16 | Paul Spruell / Bill Bean | Porsche 911 S | Bill Bean | 2:18.2840 |
| 39th | 45 | Armando Ramirez / Camilo Mutiz / Juan Montalvo / Mandy Alvarez | Porsche 911 S | Delta Racing | 2:18.9790 |
| 40th | 46 | Spencer Buzbee / Craig Ross / William Frates | Datsun 240Z | Spencer Buzbee | 2:21.5080 |
| 41st | 98 | James Alspaugh / Gene Persinger | Chevrolet Corvette C3 | James W. Persinger | 2:21.5200 |
| 42nd | 28 | Anatoly Arutunoff / Brian Goellnicht / Alf Gebhardt | Lotus Europa | Anatoly Arutunoff | 2:21.7790 |
| 43rd | 90 | Ray Walle / Tom Reddy | Mazda RX-3 | Ray Walle | 2:21.8460 |
| 44th | 26 | Mike Williamson / Al Cosentino / Charles Gano | Chevrolet Camaro | Al Cosentino | 2:22.3200 |
| 45th | 84 | Klaus Selbert / David Biggs | Porsche 911 S | Klaus Selbert | 2:23.3950 |
| 46th | 7 | Amos Johnson / Steve Coleman / Dennis Shaw | AMC Gremlin | Levi's Team Highball | 2:26.8770 |
| 47th | 83 | Arthur Mollin / Michael Gatoff / Art Riley | Volvo 142 | Arthur Mollin | 2:29.2710 |
| 48th | 12 | Richard C. Hughes / Robert Whitaker / Fred Geisel | Datsun 510 | Precision Performance | 2:31.9810 |
| 49th | 29 | Bruce Mabrito / Jack Steel | Datsun 240Z | Bruce Mabrito | 2:32.0510 |
| 50th | 44 | John Freyre / Albert Naon / Tony Garcia | Porsche 911 S | Delta Racing | no time |
| 51st | 72 | Gilberto Jimenez | Mazda RX-2 | Cafe Mexicana Racing | no time |
| 52nd | 00 | Jim Corwin / Jerry Mull | Chevrolet Camaro | Jim Corwin | no time |
| 53rd | 20 | John Morton | Ferrari 365 GTB/4 | Francisco Mir | no time |
| 54th | 32 | Sepp Greger / Eberhard Sindel / Dieter Schmid | Porsche Carrera | Sepp Greger | no time |
| 55th | 52 | Bob Punch / John Rulon-Miller / Tom Waugh | Porsche 911 S | Doell Enterprises | no time |
| 57th | 55 | Lee Cutler | Porsche 914/6 | Cutler/Pickens | no time |
| 58th | 56 | Harry Jones / Marcel Mignot / Cyril Grandet | Ferrari 365 GTB/4 | North American Racing Team? | no time |