| 1st | 24 | Hans-Joachim Stuck / Sam Posey | BMW 3.0 CSL | BMW Motorsport | 2:48.7860 |
| 2nd | 59 | Peter Gregg / Hurley Haywood | Porsche 911 Carrera RSR 3.0 | Brumos Porsche-Audi | 2:50.3260 |
| 3rd | 75 | John Greenwood / Jerry Thompson | Chevrolet Corvette C3 | John Greenwood | 2:51.3870 |
| 4th | 25 | Hans-Joachim Stuck / Brian Redman / Allan Moffat / Sam Posey | BMW 3.0 CSL | BMW Motorsport | 2:51.6340 |
| 5th | 14 | Al Holbert / Elliot Forbes-Robinson | Porsche 911 Carrera RSR 3.0 | Holbert's Porsche-Audi | 2:54.9180 |
| 6th | 43 | John Graves / John O'Steen / Dave Helmick | Porsche Carrera RSR | Ecurie Escargot | 2:55.7500 |
| 7th | 1 | Michael Keyser / Billy Sprowls / Andres Contreras | Porsche 911 Carrera RSR 3.0 | Toad Hall Racing | 2:55.8880 |
| 7th | 03 | Philip Dann / Stephen Bond | Opel GT | Ozone Industries | 4:28.0480 |
| 8th | 3 | Harry Theodoracopulos / Skip Barber | Ford Capri RS | Ippocampos Racing | 2:55.9040 |
| 9th | 88 | Maurice Carter / Tony DeLorenzo | Chevrolet Camaro | Maurice Carter | 2:56.1790 |
| 10th | 23 | Charlie Kemp / Carson Baird | Porsche 911 Carrera RSR | Armorall Racing Team | 2:56.3150 |
| 11th | 30 | George Dyer / Jacques Bienvenue | Porsche 911 Carrera RSR 3.0 | George Dyer | 2:56.4520 |
| 12th | 26 | Tim Chitwood / Joie Chitwood | Chevrolet Camaro | Tim Chitwood | 2:57.6180 |
| 13th | 79 | Michael Callas / Jim Cook / Adrian Gang | Porsche Carrera RSR | Michael Callas | 2:58.8200 |
| 14th | 5 | Bob Harmon / Jon Woodner | Porsche Carrera RSR | Bob Harmon | 2:59.0780 |
| 15th | 74 | Norm Ridgely / Ludwig Heimrath | Porsche Carrera RSR | Ludwig Heimrath | 2:59.6450 |
| 16th | 33 | Roberto Quintanilla / David Loring | Porsche Carrera RSR | Roberto Quintanilla | 3:00.2900 |
| 17th | 2 | Daniel Muniz | BMW 3.0 CSL | Daniel Muniz | 3:02.0360 |
| 18th | 91 | Juan Carlos Bolanos / Michel Jourdain / Gustavo Bolanos | Porsche Carrera RSR | Bolanos Racing | 3:03.3810 |
| 19th | 8 | Bob Beasley / Bruce Jennings | Porsche Carrera RSR | Bob Beasley | 3:04.2700 |
| 20th | 12 | Ford Smith / Clay Young / Bennett Aiken | Chevrolet Corvette | Ford Smith | 3:04.3060 |
| 21st | 48 | John Carusso / Dick Vreeland / Luis Sereix | Chevrolet Corvette | John Carusso | 3:05.8410 |
| 22nd | 73 | Bob Christiansen / Gary Myers | Chevrolet Camaro | Robert Christiansen | 3:07.4880 |
| 23rd | 32 | John Orr / Bill Jobe | Chevrolet Corvette C3 | E. F. Miller & Co. | 3:07.7520 |
| 24th | 17 | Vince Gimondo / John Tremblay | Chevrolet Camaro | Vince Gimondo | 3:08.4090 |
| 25th | 4 | George Dickinson / Bill Webbe / Harry Theodoracopulos | Porsche 911 Carrera RSR 3.0 | George Dickinson | 3:08.4460 |
| 26th | 87 | Harry Jones / Marcel Mignot | Ferrari 365 GTB/4 | Jones Motorsports | 3:09.3190 |
| 27th | 71 | Amos Johnson / Dennis Shaw | AMC Gremlin | Levi's Team Highball | 3:09.3870 |
| 28th | 22 | Dale Kreider / Bob DeMarco | Chevrolet Corvette | Dale Kreider | 3:10.6930 |
| 29th | 54 | John Tunstall / Joe Jenkins | Porsche Carrera RSR | Southpoint Porsche | 3:10.7810 |
| 30th | 51 | John Hotchkis / Robert Kirby / Len Jones | Porsche 914/6 | Johnson-Bozzoni Porsche-Audi | 3:12.3420 |
| 31st | 92 | Mike Tillson / Dieter Oest | Porsche Carrera RSR | Oest-Tillson Racing | 3:12.5610 |
| 32nd | 67 | David McClain / Dave White | Porsche 911 S | David McClain | 3:12.8020 |
| 33rd | 69 | Juan Montalvo | Ford Escort | Juan Montalvo | 3:13.2290 |
| 34th | 77 | Ralph Noseda / Ray Mummery | Chevrolet Camaro | Ralph Noseda | 3:13.2460 |
| 35th | 95 | Sergio Tabe / Jose Marron / Fidel Martinez | Porsche Carrera RSR | Sergio Tabe | 3:13.3100 |
| 36th | 68 | Diego Febles / Hiram Cruz | Porsche Carrera RSR | Diego Febles Racing | 3:13.8410 |
| 37th | 34 | George Drolsom / Bob Nagel | Porsche 911 S | George Drolsom | 3:14.1870 |
| 38th | 62 | Scott Chapman / Bill Hood / Bobby Dumont | Chevrolet Corvette | Scott Chapman | 3:15.4360 |
| 39th | 46 | Spencer Buzbee / Craig Ross / William Frates | Datsun 240Z | Buzbee Tropical Fish | 3:15.4560 |
| 40th | 84 | Bob Speakman / John Maffucci | Datsun 240Z | Bob Speakman | 3:16.0440 |
| 41st | 76 | Burt Greenwood / Scott Voeltz / Dana English | Chevrolet Corvette | Kidd-America Racing | 3:16.1790 |
| 42nd | 44 | Tony Garcia / Albert Naon / John Freyre | Porsche 911 S | Montura Ranch Estates | 3:16.9940 |
| 43rd | 60 | Rusty Bond / George Rollin / John Belperche | Porsche 911 | Rusty Bond | 3:17.8090 |
| 44th | 10 | Alf Gebhardt / Bruno Beilcke / Sepp Grinbold | BMW 2002 | Alf Gebhardt | 3:18.9540 |
| 45th | 56 | Charles Gano / Mike Williamson / Jerry Parson | Chevrolet Camaro | Charles Gano | 3:19.2550 |
| 46th | 18 | Terry Wolters / Jack Swanson | Chevrolet Camaro | Terry Wolters | 3:20.1330 |
| 47th | 40 | John Hastings / Glenn Bunch | Jaguar XKE | John Hastings | 3:20.8490 |
| 48th | 28 | Bonky Fernandez / Mandy Gonzalez / Gustavo Chevres | Lotus Elan | Bonky Fernandez | 3:21.0630 |
| 49th | 55 | Henry Simon / J. Kirby Stumpff / Augusto Molina | Ford Mustang | Henry Simon | 3:22.0810 |
| 50th | 90 | Ray Walle / Tom Reddy | Mazda RX-3 | Ray Walle Mazda | 3:22.2590 |
| 51st | 86 | Dennis Stefl / Robert Fordyce | Chevrolet Corvette | Dennis Stefl | 3:25.2280 |
| 52nd | 9 | Tony Ansley | Chevrolet Corvette | Tony Ansley | 3:22.9540 |
| 53rd | 27 | Robert E. Davis / Tico Almeida / Joseph DeGirolamo | Chevrolet Corvette | Robert E. Davis | 4:17.7300 |
| 54th | 41 | Herb Jones, Jr. / Phil Currin / Steve Faul | Chevrolet Camaro | Herb Jones, Jr. | 3:50.9500 |
| 55th | 72 | Bill Arnold / Wiley Doran | Chevrolet Corvette | Bill Arnold | 3:24.3150 |
| 56th | 57 | Marty Hinze / Bob Grossman | De Tomaso Pantera | Marty Hinze | no time |
| 57th | 85 | John Hulen / Ron Coupland / Dave Causey | Porsche 914/6 | John E. Hulen | 3:25.9040 |
| 58th | 63 | Bob Punch / Tom Waugh / Eliott Mendenhall | Porsche 911 | Doell Enterprises | 3:30.2820 |
| 59th | 31 | Luiz Garcia, Jr. / Jose Arzeno / Mandy Gonzalez | BMW 2002 | Luiz Garcia, Jr. | 3:31.4070 |
| 60th | 47 | Jacques Groleau / A. J. Brent / John Sweeney | Datsun 240Z | Jacques Groleau | 3:25.1570 |
| 61st | 82 | Bill Scott / Harry MacDonald / Bill Neuhoff | AMC Gremlin | Bill Scott Racing | 3:25.2660 |
| 62nd | 53 | Arthur Mollin / Art Riley | Volvo 142 | Arthur Mollin | 3:35.9530 |
| 63rd | 45 | Armando Ramirez / Camilo Mutiz / Mauricio DeNarvaez | Porsche 911 S | Delta Racing | no time |
| 64th | 29 | Bruce Mabrito / Jack Steel | Datsun 240Z | Bruce Mabrito | 3:31.9320 |
| 65th | 38 | Roberto Boza / Diosdado Diaz / Eduardo Garrido | Chevrolet Camaro | Roberto Boza | no time |
| 66th | 66 | Nick Craw / Russ Norburn | BMW 2002 | Miller & Norburn | 3:36.5660 |
| 67th | 58 | Ron Oyler / Guy Church | Renault R12 | Professional Paint & Body | 3:46.6410 |
| 68th | 50 | Pedro Vazquez / Manuel Quintana / Don Yenko | Porsche 911 S | Pedro Vasquez, Jr. | 3:27.7030 |
| 69th | 61 | Larry Parker / Robert LaMay / Paul Morgan | Ford Pinto | Larry Parker | no time |
| 70th | 111 | Milt Minter / Eppie Wietzes | Ferrari 365 GT4/BB | North American Racing Team | no time |
| 71st | 914 | Bill Schmid / Doc Bundy | Porsche 914 | Holbert's Porsche-Audi | 3:47.7440 |
| 72nd | 49 | Neil Potter / Bob Gray / Terry Keller | Ford Mustang | Neil Potter | 3:27.1690 |