| 1st | 1 | Jo Siffert / Brian Redman | Porsche 908/02 Flunder | Porsche of Austria | 1:08.4700 |
| 2nd | 9 | Johnny Servoz-Gavin / Pedro Rodriguez | Matra MS650 | Matra of France | 1:09.2300 |
| 3rd | 4 | Vic Elford / Richard Attwood | Porsche 908/02 | A. G. Dean Racing Ltd. | 1:10.2600 |
| 4th | 11 | Jo Bonnier / Herbert Müller | Lola T70 Mk.3B GT Chevrolet | Scuderia Filipinetti | 1:11.1000 |
| 5th | 5 | Jackie Oliver / Jacky Ickx | Mirage M3/300 Ford | J. W. Automotive Engineering | 1:11.1800 |
| 6th | 2 | Joe Buzzetta / Rudi Lins | Porsche 908/02 | Porsche of Austria | 1:11.6200 |
| 7th | 10 | Jean Guichet / Robin Widdows | Matra MS630/650 | Matra of France | 1:11.8600 |
| 8th | 7 | Reinhold Jöst / Helmut Kelleners | Ford GT40 | Racing Team Deutsche Auto Zeitung | 1:14.3500 |
| 9th | 12 | Fred Baker / Dick Smothers / Lou Sell | Porsche 906 E | Dick Smothers Racing | 1:17.7700 |
| 10th | 14 | Tony DeLorenzo / Dick Lang | Chevrolet Corvette C3 | Owens-Corning Fiberglas Racing Team | 1:17.7700 |
| 11th | 24 | Francis Grant / Howard Brown | Ford GT40 | Auto Enterprises | 1:18.2000 |
| 12th | 15 | Jerry Thompson / Bill Morrison | Chevrolet Corvette 427 | Owens-Corning Fiberglas Racing Team | 1:18.3100 |
| 13th | 30 | Robert D. Esseks / John Paul | Chevrolet Corvette 427 | Robert D. Esseks | 1:20.4300 |
| 14th | 26 | Bob Grossman / Don Yenko | Chevrolet Camaro 427 Coupe | Yenko Sports Cars, Inc. | 1:21.5600 |
| 15th | 68 | Mike Rahal / Hugh Wise / Tom Terrell | Porsche 906 | Nationwide Food Brokers | 1:25.2000 |
| 16th | 77 | Jacques Duval / George Nicholas | Porsche 911 T | Jacques Duval | 1:25.3100 |
| 17th | 52 | Bert Everett / Bob Bailey / Jim Locke | Porsche 911 T | PART | 1:25.8200 |
| 18th | 58 | Peter Gregg / Hurley Haywood | Porsche 911 S | Brumos Porsche Corp. | 1:25.9800 |
| 19th | 71 | Bruce Jennings / Mike Downs | Porsche 911 T | PART - Bruce Jennings | 1:26.3000 |
| 20th | 70 | Merv Rosen / Stephen Behr | Porsche 906 | Dr. Mervin Rosen | 1:26.4200 |
| 21st | 72 | Jim Netterstrom / John Kelly | Porsche 911 T | PART - Bruce Jennings | 1:26.7100 |
| 22nd | 88 | Jacques Bienvenue / Jacques Duval / Carson Baird | Porsche 911 S | Jacques Bienvenue | 1:28.8700 |
| 23rd | 48 | Jim McDaniel / Steve Pieper | Zink VSR Volkswagen | HRH Corporation | 1:29.3300 |
| 24th | 39 | Horst Petermann / Max Beimler / Rainer Brezinka | Porsche 906 | Rainer Brezinka | 1:29.4500 |
| 25th | 37 | Dieter Oest / Albert Kalatzich | Porsche 904 | Auto Enterprises | 1:29.8000 |
| 26th | 73 | Paul Richards / Jim Baker | Austin-Healey Sprite | Ring Free Racing Team | 1:31.6500 |
| 27th | 75 | Kris Harrison / Bob Barrell | Unipower GT BMC | Ecurie Canada | 1:33.9200 |
| 28th | 94 | Ralph Meaney / Jack Caruso | Porsche 911 S | Ralph Meaney | 1:34.6300 |
| 29th | 27 | Ray Cuomo / Gregg Cameron | Austin-Healey Sprite | Arthur D. Tuckerman | 1:35.1900 |