| 1st | 8 | Ickx / Redman | Ford GT40 | J. W. Automotive Eng. | 1:54.910 | 1:54.9100 |
| 2nd | 9 | Hawkins / Hobbs | Ford GT40 | J. W. Automotive Eng. | 1:57.000 | 1:57.0000 |
| 3rd | 53 | Mitter / Stommelen / *Herrmann | Porsche 907 LH 2.2 | Porsche Works Team | 1:57.310 | 1:57.3100 |
| 4th | 52 | Siffert / Herrmann / *Mitter | Porsche 907 LH 2.2 | Porsche Works Team | 1:58.220 | 1:58.2200 |
| 5th | 54 | Elford / Neerpasch / Stommelen / Siffert / Herrmann | Porsche 907 LH 2.2 | Porsche Works Team | 1:59.150 | 1:59.1500 |
| 6th | 51 | Schlesser / Buzzetta | Porsche 907 LH 2.2 | Porsche Works Team | 2:00.160 | 2:00.1600 |
| 7th | 76 | Heppenstall / Lowther / Thompson | Howmet TX Continental | Howmet Corp. | 2:01.190 | 2:01.1900 |
| 8th | 81 | Piper / Gregory | Ferrari 250 LM | N.A.R.T.-Harrah Racing | 2:02.000 | 2:02.0000 |
| 9th | 20 | Schütz / Vaccarella | Alfa Romeo T33/2 | Autodelta S.p.a. | 2:02.210 | 2:02.2100 |
| 10th | 80 | Rodriguez / Kolb | Ferrari Dino 206 S | N.A.R.T.-Harrah Racing | 2:02.290 | 2:02.2900 |
| 11th | 23 | Andretti / Bianchi | Alfa Romeo T33/2 | Autodelta S.p.a. | 2:02.380 | 2:02.3800 |
| 12th | 55 | Steinemann / Spoerry | Porsche 907 LH | Squadra Tartaruga | 2:02.600 | 2:02.6000 |
| 13th | 22 | Casoni / Biscaldi / Zeccoli | Alfa Romeo T33/2 | Autodelta S.p.a. | 2:02.730 | 2:02.7300 |
| 14th | 34 | Gunn / Ortega / Merello | Ferrari 250 LM | Raceco-Miami | 2:03.800 | 2:03.8000 |
| 15th | 44 | Guldstrand / Leslie / Patrick / Jordan | Chevrolet Corvette | American International Racing | 2:04.000 | 2:04.0000 |
| 16th | 45 | Patrick / Jordan / Caplan | Chevrolet Corvette | American International Racing | 2:05.200 | 2:05.2000 |
| 17th | 31 | Grant / Morgan | Chevrolet Corvette | DX Sunray Oil Co. | 2:05.410 | 2:05.4100 |
| 18th | 12 | Vestey / Pike / Ridgway | Ferrari 250 LM | Paul Vestey Racing | 2:05.430 | 2:05.4300 |
| 19th | 29 | Revson / Yenko | Chevrolet Corvette Roadster | DX Sunray Oil Co. | 2:06.320 | 2:06.3200 |
| 20th | 6 | Donohue / Johnson / Fisher | Chevrolet Camaro | Roger Penske Racing Ent. | 2:06.610 | 2:06.6100 |
| 21st | 18 | Nelson / Hailwood | Ford GT40 | Edward Nelson Racing | 2:07.200 | 2:07.2000 |
| 22nd | 1 | Titus / Bucknum | Ford Mustang | Shelby Racing | 2:07.310 | 2:07.3100 |
| 23rd | 30 | Thompson / DeLorenzo | Chevrolet Corvette Roadster | DX Sunray Oil Co. | 2:07.730 | 2:07.7300 |
| 24th | 2 | Moffat / Kwech / Follmer | Ford Mustang | Shelby Racing | 2:08.510 | 2:08.5100 |
| 25th | 37 | Wonder / Cuomo | Ford GT40 | William Wonder, Inc. | 2:09.740 | 2:09.7400 |
| 26th | 11 | Martland / Classick | Chevron B6 BMW | Chevron Cars | 2:10.490 | 2:10.4900 |
| 27th | 3 | McDaniel / Sullivan | Porsche 911 R | HRH Corp. | 2:12.950 | 2:12.9500 |
| 28th | 65 | Wintersteen / Starr | Ford Mustang | Starr Racing | 2:13.110 | 2:13.1100 |
| 29th | 71 | Chitwood / Barton / Hoffman | Chevrolet Camaro | Joie Chitwood Thrill Show | 2:15.910 | 2:15.9100 |
| 30th | 4 | Moore / Murphy | Chevrolet Camaro | HRH Corp. | 2:16.130 | 2:16.1300 |
| 31st | 10 | Lanfranchi / Konig | Nomad Mk.1 Ford | Nomad Cars | 2:16.710 | 2:16.7100 |
| 32nd | 15 | Grossman / Dini | Ford Mustang | Randy's Auto Body | 2:18.000 | 2:18.0000 |
| 33rd | 68 | Boye / Yuma | Chevrolet Camaro | Bill Boye | 2:18.740 | 2:18.7400 |
| 34th | 14 | Everett / Jennings / Bailey | Porsche 911 S | Bob Holbert's Garages | 2:18.810 | 2:18.8100 |
| 35th | 59 | Gregg / Axelsson | Porsche 911 | Brumos Porsche | 2:19.300 | 2:19.3000 |
| 36th | 7 | Hagan / McVeigh / Gillebard | Mercury Cougar | Billy Hagan | 2:20.360 | 2:20.3600 |
| 37th | 19 | Keenan / Torpy / Sutter | Chevrolet Corvette | D-K Racing | 2:21.320 | 2:21.3200 |
| 38th | 32 | Ryan / Harrison | Porsche 911 | RBM Motors | 2:21.370 | 2:21.3700 |
| 39th | 28 | Ross / Pelouze | Chevrolet Corvette Roadster | Corvette Racing Associates | 2:21.710 | 2:21.7100 |
| 40th | 56 | Netterstrom / Kelly / Sabel | Porsche 911 | Ship Sharpe Maintenance | 2:22.250 | 2:22.2500 |
| 41st | 77 | Stoddard / Drolsom / Gifford / Williams, Jr. | Porsche 911 | Lewis Wiliams, Jr. | 2:22.610 | 2:22.6100 |
| 42nd | 61 | Hanrioud / Garant | Porsche 911 S | J. P. Hanrioud | 2:23.250 | 2:23.2500 |
| 43rd | 72 | Richards / Adamowicz / Davidson | Porsche 911 T | Davidson Enterprises | 2:23.400 | 2:23.4000 |
| 44th | 64 | Taylor / Pratt / Myers / Brooker | Alfa Romeo GTA | Myers Construction | 2:24.000 | 2:24.0000 |
| 45th | 73 | Opert / Grimaldi | Porsche 911 | Valvoline/Opert Racing | 2:24.050 | 2:24.0500 |
| 46th | 5 | Sherk / Diehl | Dodge Dart | Bud Sherk Auto Fair | 2:24.500 | 2:24.5000 |
| 47th | 24 | Cella / Zeccoli / Biscaldi | Alfa Romeo GTA | Autodelta S.p.a. | 2:25.200 | 2:25.2000 |
| 48th | 78 | Posey / Kauffman | Ford Mustang | | 2:25.340 | 2:25.3400 |
| 49th | 36 | Pickett / Bean / Bencker | Porsche 911 | Dr. Wilbur Pickett | 2:25.360 | 2:25.3600 |
| 50th | 26 | Maglioli / Andersson / Baghetti | Lancia Fulvia Zagato | Algar Enterprises | 2:26.040 | 2:26.0400 |
| 51st | 25 | Pinto / Dini | Alfa Romeo GTA | Autodelta S.p.a. | 2:27.500 | 2:27.5000 |
| 52nd | 46 | Payne-Herbert / Miller / Walton | Porsche 356B Carrera 2 | WROD Radio | 2:28.350 | 2:28.3500 |
| 53rd | 42 | Rodgers / Robson / Buchman | Jaguar XKE | Coquina Motors | 2:28.700 | 2:28.7000 |
| 54th | 67 | Kleinpeter / Mummery / Hollander | Shelby GT350 | Port of Entry Motors | 2:30.890 | 2:30.8900 |
| 55th | 96 | Tremblay / Dingman / Gimondo | Chevrolet Corvette Sting Ray | Vince Gimondo | 2:31.390 | 2:31.3900 |
| 56th | 47 | Vega / Witt / *Cameron | Triumph TR4A | John Cameron | 2:33.100 | 2:33.1000 |
| 57th | 43 | Schwenker / Dube / Kelder | Triumph TR4A | Cannons Auto Service | 2:33.300 | 2:33.3000 |
| 58th | 27 | Baghetti / Facetti / Andersson | Lancia Fulvia HF | Algar Enterprises | 2:33.700 | 2:33.7000 |
| 59th | 49 | Maxwell / Martin | Volvo 122 S | Ike A. Maxwell, Jr. | 2:35.700 | 2:35.7000 |
| 60th | 57 | Cline / Pickering | Triumph GT6 | Richard P. Cline | 2:37.210 | 2:37.2100 |
| 61st | 48 | Poole / Stott / Morehead / *Harris | Triumph TR4A | Doyle Poole | 2:39.420 | 2:39.4200 |
| 62nd | 41 | Rushin / Harris / Waldron | MGB | Thomas Harris | 2:45.110 | 2:45.1100 |
| 63rd | 58 | Andrews, Jr. / Kondracki | Triumph Spitfire | Richard Cline | 2:47.280 | 2:47.2800 |
| 64th | 35 | George Waltman | Morgan Plus 4 | Aztec Motor Racing | 2:49.990 | 2:49.9900 |