(Qualifying Results)
| Pos. | No. | Drivers | Car | Entrant | Q Time | Km/h |
| 1st | 86 | Peterson / Schenken | Ferrari 312 PB | SEFAC Ferrari | 1:47.3870 | 182.1922 |
| 2nd | 85 | Andretti / Ickx | Ferrari 312 PB | SEFAC Ferrari | 1:47.8640 | |
| 3rd | 10 | Bell / Pace | Mirage M6 Ford | Gulf Racing Research Co. | 1:48.3420 | |
| 4th | 87 | Redman / Merzario | Ferrari 312 PB | SEFAC Ferrari | 1:48.8400 | |
| 5th | 90 | Wisell / Larrousse | Lola T280 Ford | Ecurie Bonnier | 1:48.9420 | |
| 6th | 20 | van Lennep / Adamowicz | Mirage M6 Ford | Gulf Racing Research Co. | 1:50.6180 | |
| 7th | 33 | Minter / Patrick | Alfa Romeo T33/3 | Otto Zipper Racing Team | 1:53.2360 | |
| 8th | 42 | Jöst / Casoni | Porsche 908/03 | Reinhold Joest | 1:55.2690 | |
| 9th | 29 | van Beuren, Jr. / Buffum | Chevron B21 Ford | Libre International Racing | 1:57.4960 | |
| 10th | 68 | Dean / Brown | Porsche 908/02 | A. G. Dean | 1:59.0640 | |
| 11th | 25 | Schuster / Perez Gama | Chevron B19 Ford | Marathon - Douglas Shierson Racing | 2:01.3710 | |
| 12th | 11 | Jordan / Crean | Chevron B21 Ford | John Crean Racing | 2:01.8230 | |
| 24 | Cluxton / Moran | Ferrari Dino 246 GT | North American Racing Team | 2:03.7910 | |
| 13th | 52 | Kleinpeter / Belcher | Chevron B21 Ford | Promotional Advertising Corp. | 2:04.3590 | |
| 14th | 55 | McCaig / McCaig | Lola T212 Ford | Roger McCaig Racing | 2:04.8440 | |
| 15th | 66 | Murray / Knupp | Chevrolet Corvette | Mike Murray | 2:05.8250 | |
| 16th | 93 | Fisher / Gloy | Chevron B16 Ford | Hobby Car Enterprises | 2:06.2360 | |
| 17th | 23 | Pickett / Kemp | Chevrolet Corvette | Rinzler Motor Racing - Holliday Inns, Inc. | 2:07.0450 | |
| 18th | 26 | Shierson / Barber | Chevron B19 Ford | Marathon - Douglas Shierson Racing | 2:07.2880 | |
| 24th | 28 | De Cadenet / Birrane | Duckhams LM Ford | Alain de Cadenet | 2:08.2930 | |
| 19th | 21 | Posey / Hobbs | Ferrari 365 GTB/4 | North American Racing Team | 2:09.9810 | |
| 20th | 22 | Jarier / Young | Ferrari 365 GTB/4 | North American Racing Team | 2:10.1920 | |
| 25th | 37 | Sherman / Lo Bianco | Chevron B19 Ford | LoBianco Trucking, Inc. | 2:10.3240 | |
| 26th | 35 | Kepler / Orr | Chevrolet Corvette | Velvetouch GT | 2:11.1100 | |
| 27th | 31 | Alden / Wiernicki / Wiernicki | Chevrolet Corvette | Neil Allen | 2:11.1150 | |
| 29th | 88 | Abate / Soltau | Porsche 910 | Edwin Abate, D.D.S. | 2:11.7590 | |
| 21st | 59 | Haywood / Gregg | Porsche 911 S | Brumos Porsche-Audi Corp. | 2:11.9810 | |
| 28th | 61 | Locke / Bailey | Porsche 911 S | Jim Locke | 2:12.0280 | |
| 22nd | 57 | Heinz / Johnson | Chevrolet Corvette | Race Enterprises and Development, Inc. | 2:12.0900 | |
| 39 | Bartling / Petermann / Brezinka | Porsche 910 | Ray Brezinka | 2:12.2050 | |
| 23rd | 16 | Keyser / Beasley | Porsche 911 S | Toad Hall Racing | 2:13.1040 | |
| 30th | 18 | DeLorenzo / Reynolds | Ferrari 365 GTB/4 | Baker Motor Co. - Castrol Oil Racing Team | 2:13.2000 | |
| 33rd | 63 | Oleyar / Luebbe | Chevrolet Corvette | Michael Oleyar | 2:13.5540 | |
| 31st | 43 | O'Steen / Helmick / *Kremer | Porsche 911 S | Ecurie Escargot | 2:13.6650 | |
| 32nd | 64 | Baechle / Laughlin | Chevrolet Corvette C3 | C. Weaver Chevrolet | 2:13.6680 | |
| 48 | Greenwood / Smothers / Cordts | Chevrolet Corvette | John Greenwood Racing | 2:13.6720 | |
| 34th | 49 | Greenwood / Smothers / *Cordts / *Long / *Greendyke | Chevrolet Corvette | John Greenwood Racing | 2:13.7050 | |
| 36 | Miller / Orr / Miller / Kepler | Chevrolet Corvette | Velvetouch GT | 2:14.7660 | |
| 89 | Oest / Tillson | Porsche 911 T | Holbert's Porsche-Audi | 2:17.2730 | |
| 77 | Stone / Jennings | Porsche 911 T | Silverstone Racing | 2:17.7710 | |
| 50 | Greenwood / Long | Chevrolet Corvette | John Greenwood Racing | 2:17.9110 | |
| 80 | Hochreuter / *Bytzek | Porsche 911 | Kennedy-Car Collision | 2:22.2790 | |
| 27 | Mollin / Weiss | Porsche 911 S | Richard C. Weiss | 2:23.3100 | |
Other present cars:
| No. | Drivers | Car | Entrant |
| 17 | Schumacher / Nagel / Lowther | Chevrolet Corvette | Bill Schumacher |
| 99 | Wechsler / Heppenstall | Royale RP4 Ford | Robert Wechsler |
Entered cars that did not arrive:
| No. | Drivers | Car | Entrant |
| 9 | Bob Grossman | De Tomaso Pantera | Bob Grossman |
| 70 | McDonald / Everett | Porsche 914/6 | Algar Enterprises, Inc. |
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