| 1st | 2 | Jochen Mass / Jacky Ickx | Porsche 935 | Martini Porsche Racing | 1:55.2490 | 169.7633 |
| 2nd | 4 | Rolf Stommelen / Manfred Schurti | Porsche 935 | Martini Porsche Racing | 1:55.8810 | 167.2300 |
| 3rd | 6 | Leo Kinnunen / Toine Hezemans / Egon Evertz | Porsche 934/5 2.8 | Martini Porsche Racing | 1:57.6320 | |
| 4th | 11 | John Fitzpatrick | BMW 3.5 CSL | BMW Motorsport GMBH | 2:00.3060 | 162.4000 |
| 5th | 1 | Michael Keyser / Eddie Wachs | Chevrolet Monza | Michael Keyser | 2:00.4110 | 162.4794 |
| 6th | 59 | Peter Gregg / Hurley Haywood | BMW 3.5 CSL | BMW Motorsport GMBH | 2:01.1930 | 161.2800 |
| 7th | 10 | Ronnie Peterson / Dieter Quester | BMW 3.5 CSL | BMW Motorsport GMBH | 2:01.6550 | 160.6390 |
| 8th | 16T | George Follmer / John Morton | Porsche 934 | Vasek Polak Racing | 2:01.9840 | 160.4350 |
| 9th | 14 | Al Holbert / Jim Busby | Porsche 934 | Holbert Racing, Inc. | 2:02.4020 | 159.6700 |
| 10th | 56 | Bob Hagestad / Jerry Jolly | Porsche 911 Carrera RSR | Bob Hagestad Porsche-Audi | 2:04.3260 | 157.1000 |
| 11th | 75 | Norm Ridgely / Jim Cook | Porsche Carrera RSR | Heimrath Racing | 2:05.0470 | 156.2900 |
| 12th | 74 | Ludwig Heimrath / Jacques Bienvenue | Porsche Carrera RSR | Heimrath Racing | 2:05.1440 | 156.1300 |
| 13th | 5 | John Gunn | Porsche 911 Carrera RSR 3.0 | Racing Consultants/Dalles | 2:05.6320 | 154.8700 |
| 14th | 3 | John Graves / Dave Helmick / John O'Steen | Porsche Carrera RSR | Ecurie Escargot Racing Team | 2:06.7030 | 154.3600 |
| 15th | 36 | Paul Miller / Kenper Miller | Porsche 934 | Paul Miller | 2:08.7200 | 151.7900 |
| 16th | 13 | Warren Agor / Maurice Carter | Chevrolet Monza | Warren Agor Racing | 2:09.3300 | 151.1500 |
| 17th | 76 | Joe Chamberlain / Carl Shafer | Chevrolet Camaro 350 | Arrow Heating Co. | 2:11.8280 | 148.2500 |
| 18th | 39 | John Bauer / Walt Maas | Porsche 911 | John B. Racing | 2:12.1610 | 147.7700 |
| 19th | 78 | Babe Headley / Sam Feinstein | Chevrolet Corvette C3 427 | Babe's Garage | 2:13.0340 | 146.8100 |
| 20th | 60 | John Brandt | Chevrolet Corvette 350 | John J. Brandt, Jr. | 2:13.3850 | 146.4800 |
| 21st | 57 | Bob Grossman / John Wood | Porsche 911 Carrera RSR 3.0 | John Jolitte Wood | 2:14.0620 | 145.6800 |
| 22nd | 22 | Denny Long / Bill Jobe | Chevrolet Corvette 460 | Long Racing | 2:14.0760 | 145.5300 |
| 23rd | 92 | John Orr / Craig Carter | Chevrolet Corvette 454 | Sherrill Auto Services | 2:14.3780 | 145.3600 |
| 24th | 79 | Michael Callas / Wiley Doran | Porsche Carrera RSR | Michael Callas | 2:14.4370 | 145.2800 |
| 25th | 95 | Robert Frostrom / John Moore | Porsche Carrera RSR | Frostrom and Sons, Sports & Imports | 2:14.7200 | 145.2200 |
| 26th | 72 | Mike Tillson / Dieter Oest | Porsche Carrera RSR | Oest/Tillson Racing | 2:14.7850 | 145.0400 |
| 27th | 90 | Thomas Rynone / Neil Wiernicki / Michael Wiernicki | Chevrolet Corvette 427 | Rynone Industries | 2:15.2060 | 144.5500 |
| 28th | 7 | Allan Anderson / Bernie DeGraff | Chevrolet Corvette 350 | Yankee Silicones, Inc. | 2:16.2390 | 143.4300 |
| 29th | 93 | Michael Oleyar / Richard Weiss | Chevrolet Corvette 427 | Little Foreign Car Shop | 2:17.5920 | 141.9800 |
| 30th | 28 | Joe Pirrotta | Chevrolet Corvette 427 | Hager Racing Enterprises | 2:19.6880 | 139.8900 |
| 31st | 42 | Bill Scott | VW Scirocco | S.R.A. (Scott Racing Associates) | 2:24.2900 | 135.0700 |
| 32nd | 43 | Milt Minter | VW Scirocco | S.R.A. (Scott Racing Associates) | 2:25.3550 | 134.4200 |
| 33rd | 77 | Bruce Jennings / Bill Bean | Porsche 911 S | Bruce Jennings | 2:25.8510 | 134.2800 |
| 34th | 40 | David Kicak | Chevrolet Corvette 350 | Ralph Manaker, Creative Racing | 2:26.2180 | 133.6200 |