| 1st | 86 | Ronnie Peterson / Tim Schenken | Ferrari 312 PB | SEFAC Ferrari | 1:47.3870 |
| 2nd | 85 | Mario Andretti / Jacky Ickx | Ferrari 312 PB | SEFAC Ferrari | 1:47.8640 |
| 3rd | 10 | Derek Bell / Carlos Pace | Mirage M6 Ford | Gulf Racing Research Co. | 1:48.3420 |
| 4th | 87 | Brian Redman / Arturo Merzario | Ferrari 312 PB | SEFAC Ferrari | 1:48.8400 |
| 5th | 90 | Reine Wisell / Gérard Larrousse | Lola T280 Ford | Ecurie Bonnier | 1:48.9420 |
| 6th | 20 | Gijs van Lennep / Tony Adamowicz | Mirage M6 Ford | Gulf Racing Research Co. | 1:50.6180 |
| 7th | 33 | Milt Minter / Scooter Patrick | Alfa Romeo T33/3 | Otto Zipper Racing Team | 1:53.2360 |
| 8th | 42 | Reinhold Jöst / Mario Casoni | Porsche 908/03 | Reinhold Joest | 1:55.2690 |
| 9th | 29 | Fred van Beuren, Jr. / John Buffum | Chevron B21 Ford | Libre International Racing | 1:57.4960 |
| 10th | 68 | Tony Dean / Bob Brown | Porsche 908/02 | A. G. Dean | 1:59.0640 |
| 11th | 25 | Peter Schuster / Raul Perez Gama | Chevron B19 Ford | Marathon - Douglas Shierson Racing | 2:01.3710 |
| 12th | 11 | Dave Jordan / Johnnie Crean | Chevron B21 Ford | John Crean Racing | 2:01.8230 |
| 13th | 52 | Hugh Kleinpeter / Tony Belcher | Chevron B21 Ford | Promotional Advertising Corp. | 2:04.3590 |
| 14th | 55 | Roger McCaig / Maurice McCaig | Lola T212 Ford | Roger McCaig Racing | 2:04.8440 |
| 15th | 66 | Mike Murray / Ike Knupp | Chevrolet Corvette | Mike Murray | 2:05.8250 |
| 16th | 93 | Bob Fisher / Tom Gloy | Chevron B16 Ford | Hobby Car Enterprises | 2:06.2360 |
| 17th | 23 | Wilbur Pickett / Charlie Kemp | Chevrolet Corvette | Rinzler Motor Racing - Holliday Inns, Inc. | 2:07.0450 |
| 18th | 26 | Douglas Shierson / Bill Barber | Chevron B19 Ford | Marathon - Douglas Shierson Racing | 2:07.2880 |
| 19th | 21 | Sam Posey / David Hobbs | Ferrari 365 GTB/4 | North American Racing Team | 2:09.9810 |
| 20th | 22 | Jean-Pierre Jarier / Gregg Young | Ferrari 365 GTB/4 | North American Racing Team | 2:10.1920 |
| 21st | 59 | Hurley Haywood / Peter Gregg | Porsche 911 S | Brumos Porsche-Audi Corp. | 2:11.9810 |
| 22nd | 57 | Dave Heinz / Robert R. Johnson | Chevrolet Corvette | Race Enterprises and Development, Inc. | 2:12.0900 |
| 23rd | 16 | Michael Keyser / Bob Beasley | Porsche 911 S | Toad Hall Racing | 2:13.1040 |
| 24th | 28 | Alain De Cadenet / Martin Birrane | Duckhams LM Ford | Alain de Cadenet | 2:08.2930 |
| 25th | 37 | Pete Sherman / Pete Lo Bianco | Chevron B19 Ford | LoBianco Trucking, Inc. | 2:10.3240 |
| 26th | 35 | Fred Kepler / John Orr | Chevrolet Corvette | Velvetouch GT | 2:11.1100 |
| 27th | 31 | Al Alden / Neil Wiernicki / Michael Wiernicki | Chevrolet Corvette | Neil Allen | 2:11.1150 |
| 28th | 61 | Jim Locke / Bob Bailey | Porsche 911 S | Jim Locke | 2:12.0280 |
| 29th | 88 | Ed Abate / Rolf Soltau | Porsche 910 | Edwin Abate, D.D.S. | 2:11.7590 |
| 30th | 18 | Tony DeLorenzo / Charles Reynolds | Ferrari 365 GTB/4 | Baker Motor Co. - Castrol Oil Racing Team | 2:13.2000 |
| 31st | 43 | John O'Steen / Dave Helmick | Porsche 911 S | Ecurie Escargot | 2:13.6650 |
| 32nd | 64 | Bob Baechle / David Laughlin | Chevrolet Corvette C3 | C. Weaver Chevrolet | 2:13.6680 |
| 33rd | 63 | Michael Oleyar / Robert Luebbe | Chevrolet Corvette | Michael Oleyar | 2:13.5540 |
| 34th | 49 | John Greenwood / Dick Smothers | Chevrolet Corvette | John Greenwood Racing | 2:13.7050 |