| 1st | 1 | Bell / Ganley | Mirage M6 Ford | Gulf Racing | 1:45.5120 | 209.2067 |
| 2nd | 3 | Cevert / Beltoise / Pescarolo | Matra-Simca MS670 | Equipe Matra-Simca | 1:47.5420 | |
| 3rd | 2 | Hailwood / Watson | Mirage M6 Ford | Gulf Racing | 1:48.9630 | |
| 4th | 12 | Wisell / de Fierlant / Lafosse | Lola T282 Ford | Scuderia Filipinetti | 1:55.1720 | |
| 5th | 19 | Bartling / Bytzek / Kuehne | Porsche 908/02 Flunder | Harry Bytzek | 1:57.7000 | |
| 6th | 11 | DeLorenzo / Carter | Chevrolet Corvette C3 454 | Troy Promotions Inc. | 1:58.8950 | |
| 7th | 34 | Thompson / Knupp / Murray | Chevrolet Corvette | Murray Racing | 2:00.5180 | |
| 8th | 59 | Gregg / Haywood | Porsche 911 Carrera RSR | Brumos Porsche | 2:02.1560 | |
| 9th | 10 | Barber / Kemp | Chevron B19 Ford | Shierson Racing | 2:02.1880 | |
| 10th | 47 | Chitwood / Chitwood / Nagel | Chevrolet Camaro Z28 | Chitwood Racing | 2:02.3410 | |
| 11th | 52 | Kleinpeter / Gammon / Shelton | Chevron B21 Ford | Promotion Advertising | 2:02.3430 | |
| 12th | 6 | Donohue / Follmer | Porsche Carrera RSR | Penske Racing | 2:02.7940 | |
| 13th | 5 | Heinz / McClure / English | Chevrolet Corvette | Dave Heinz | 2:03.1860 | |
| 14th | 64 | Baechle / Pierce / Davidson / *Burdick | Chevrolet Corvette C3 | Weaver Chevrolet | 2:05.0180 | |
| 15th | 17 | Gimondo / Dingman | Chevrolet Camaro Z28 | Takondo Racing | 2:05.1530 | |
| 16th | 23 | Ballot-Léna / Andruet | Ferrari 365 GTB/4 | North American Racing Team | 2:05.3850 | |
| 17th | 21 | Chinetti, Jr. / Grossman / Shaw, Jr. | Ferrari 365 GTB/4 | North American Racing Team | 2:05.4080 | |
| 18th | 48 | Greenwood / Grable | Chevrolet Corvette | John Greenwood | 2:06.5670 | |
| 19th | 8 | Nehl / Durst | Chevrolet Camaro Z28 | Automotive Engineering Enterprises | 2:06.8590 | |
| 20th | 93 | Fisher / Gloy | Chevron B16 Ford | Professional Racing | 2:06.9310 | |
| 21st | 94 | Ross / Mitchell / Houser | Chevrolet Camaro Z28 | Bolus & Snopes | 2:07.4600 | |
| 22nd | 20 | Jarier / Merzario | Ferrari 365 GTB/4 | North American Racing Team | 2:07.7480 | |
| 23rd | 54 | Fitzpatrick / Kremer / Keller | Porsche 911 S | Porsche Kremer Racing | 2:07.8120 | |
| 24th | 75 | Bock / Shafer / Harrington | Chevrolet Camaro II Z28 | Don Winter | 2:07.8710 | |
| 25th | 22 | Migault / Minter | Ferrari 365 GTB/4 | North American Racing Team | 2:07.9210 | |
| 26th | 15 | Keyser / Adamowicz / Beasley | Porsche 911 S | Toad Hall Motor Racing | 2:08.5030 | |
| 27th | 9 | Kessler / Panch / Pickett | Chevrolet Camaro Z28 | Ray Kessler Inc. | 2:08.8540 | |
| 28th | 49 | Yenko / Johnson / *Greendyke / *Long / *Grable | Chevrolet Corvette | John Greenwood | 2:09.0200 | |
| 29th | 31 | Locke / Bailey | Porsche 911 S | Locke Development Corporation | 2:09.1060 | |
| 30th | 25 | Everett / Buffum / Pickett | Ford Escort | John Buffum | 2:09.5320 | |
| 31st | 43 | Helmick / O'Steen / Behr | Porsche 911 S | Dave Helmick | 2:09.5690 | |
| 32nd | 77 | Stone / Jennings / Downs | Porsche 911 S | Silverstone Racing | 2:10.4190 | |
| 33rd | 29 | Noseda / Mummery | Chevrolet Camaro | Jef Stevens | 2:11.2520 | |
| 34th | 24 | van Beuren, Jr. / Rojas / Rebaque | Ford Escort | John Buffum | 2:12.2130 | |
| 35th | 88 | Abate / Cuddy | Porsche 910 | Edwin G. Abate | 2:12.2630 | |
| 36th | 55 | Lund / Behr / Capps | Pontiac Firebird | Tiny Lund | 2:13.0630 | |
| 37th | 58 | Carduner / Bienvenue | Porsche 911 S | Brumos Porsche | 2:14.3360 | |
| 38th | 80 | Elliott / McDill | Chevrolet Camaro Z28 | Byron Cook Racing | 2:14.7660 | |
| 39th | 56 | Greger / Hild / Schmid | Porsche 911 S | Joest Racing | 2:15.0070 | |
| 40th | 33 | McComb / Dooley | Ford Mustang | John McComb | 2:15.5460 | |
| 41st | 16 | Kirill / Norburn / Bean | Porsche 911 S | Toad Hall Motor Racing | 2:15.6590 | |
| 42nd | 89 | Tillson / Holbert / Oest | Porsche 911 S | Holbert Porsche | 2:16.0380 | |
| 43rd | 14 | Canada / Christiansen / Tremblay | Chevrolet Camaro I Z28 | C. C. Canada | 2:17.0050 | |
| 44th | 62 | Bergstrom / Cook | Porsche 911 S | Bob Bergstrom | 2:18.3670 | |
| 45th | 99 | Alvarez / Febles | Porsche 911 S | Diego Febles | 2:18.4230 | |
| 46th | 30 | Levetto / Levetto / Dube | Chevrolet Camaro Z28 | Guido C. Levetto | 2:18.7150 | |
| 48th | 96 | Rodriguez / Almeida | Chevrolet Camaro Z28 | U.S. Davis Racing | 2:19.6520 | |
| 73 | Kreider / Silvers / Toppino | Triumph GT6 | Dale Kreider | 4:32.5430 | |
| 47th | 57 | Jöst / Casoni / Blancpain | Porsche 908/03 | Reinhold Jöst | no time | |
| 49th | 41 | Gage / Grob / Ouellette | Lotus 23 BMW | Parametrics Systems | no time | |
| 50th | 7 | Young / Johnson / Fitzgerald | Chevrolet Camaro Z28 | Eddie Johnson | no time | |
| 51st | 51 | Selbert / Schoenfeld / Klempel | Porsche 911 S | Airport Motorsport | no time | |
| 52nd | 84 | Petery / Ziereis | BMW 2002 | Andy Petery | no time | |
| 53rd | 38 | Muniz / Quintanilla | Porsche 914/6 | Quintanilla/Muniz | no time | |