| 1st | 3 | Foyt / Gurney | Ford Mk II | Ford Motor Co. (Shelby American) | 1:55.100 | 1:55.1000 |
| 2nd | 15 | Hill / Spence / *Hall | Chaparral 2F Chevrolet | Chaparral Cars, Inc. | 1:55.360 | 1:55.3600 |
| 3rd | 26 | Rodriguez / Guichet | Ferrari 412 P Berlinetta | North American Racing Team | 1:55.400 | 1:55.4000 |
| 4th | 23 | Bandini / Amon | Ferrari 330 P3/4 Spyder | Ferrari s.p.a. | 1:55.600 | 1:55.6000 |
| 5th | 5 | Andretti / Ginther | Ford Mk II | Ford Motor Co. (Holman & Moody) | 1:56.360 | 1:56.3600 |
| 6th | 24 | Parkes / Scarfiotti | Ferrari 330 P4 Coupé | Ferrari s.p.a. | 1:56.400 | 1:56.4000 |
| 7th | 1 | McLaren / Bianchi | Ford Mk II | Ford Motor Co. (Shelby American) | 1:56.700 | 1:56.7000 |
| 8th | 14 | Johnson / Jennings / *Hill | Chaparral 2D Chevrolet | Chaparral Cars, Inc. | 1:56.800 | 1:56.8000 |
| 9th | 6 | Hulme / Ruby | Ford Mk II | Ford Motor Co. (Holman & Moody) | 1:57.500 | 1:57.5000 |
| 10th | 2 | Bucknum / Gardner | Ford Mk II | Ford Motor Co. (Shelby American) | 1:57.600 | 1:57.6000 |
| 11th | 33 | Mairesse / "Beurlys" | Ferrari 412 P Berlinetta | Ecurie Francorchamps | 1:58.600 | 1:58.6000 |
| 12th | 4 | Donohue / Revson | Ford Mk II | Ford Motor Co. (Holman & Moody) | 1:59.400 | 1:59.4000 |
| 13th | 11 | Thompson / Ickx | Ford GT40 | J. W. Automotive (GD) | 2:01.100 | 2:01.1000 |
| 14th | 31 | Piper / Attwood | Ferrari 365 P2/3 | David Piper | 2:01.800 | 2:01.8000 |
| 15th | 34 | Kolb / Fulp | Ferrari Dino 206 S | Harrah Modern Classic Motors | 2:04.600 | 2:04.6000 |
| 16th | 51 | Mitter / Rindt | Porsche 906 E | Porsche of Stuttgart | 2:04.900 | 2:04.9000 |
| 17th | 52 | Herrmann / Siffert | Porsche 910 | Porsche of Stuttgart | 2:05.000 | 2:05.0000 |
| 18th | 56 | Vögele / Habegger / *Müller | Porsche 906 LH | Charles Vogele | 2:05.600 | 2:05.6000 |
| 19th | 9 | Maglioli / Casoni | Ford GT40 | Brescia Racing Corse | 2:06.600 | 2:06.6000 |
| 20th | 55 | Spoerry / Steinemann | Porsche 906 LH | Squadra Tartaruga Switz. | 2:08.000 | 2:08.0000 |
| 21st | 53 | Schütz / Stommelen / van Lennep | Porsche 906 | Porsche of Stuttgart | 2:10.400 | 2:10.4000 |
| 22nd | 36 | Wintersteen / Welch / Brown / *Donohue | Chevrolet Camaro | Roger Penske | 2:10.600 | 2:10.6000 |
| 23rd | 58 | Dean / Taylor | Porsche 906 | Rod Savyer | 2:10.700 | 2:10.7000 |
| 24th | 20 | Wonder / Caldwell | Ford GT40 | William Wonder, Inc. | 2:10.800 | 2:10.8000 |
| 25th | 67 | van Beuren, Jr. / Jett / Pike | Shelby GT350 | Dos Caballos Racing, Inc. | 2:14.200 | 2:14.2000 |
| 26th | 32 | Clarke / Nelson | Ferrari 250 LM | Peter Clarke | 2:15.000 | 2:15.0000 |
| 27th | 18 | West / Allison | Shelby GT350 | Roger West | 2:16.000 | 2:16.0000 |
| 28th | 66 | Yeager / Hane / Feistmann | Ford Mustang | Thomas D. Yaeger | 2:17.000 | 2:17.0000 |
| 29th | 29 | Salas Guterrez / Rebaque, Sr. | Ferrari 275 GTB/C | Pedro Rodriguez, Jr. | 2:17.100 | 2:17.1000 |
| 30th | 76 | McComb / Dooley | Ford Mustang | John McComb | 2:19.700 | 2:19.7000 |
| 31st | 40 | Fisher / Eaton | Chevrolet Camaro | Craig Fisher | 2:19.800 | 2:19.8000 |
| 32nd | 7 | Byrne / Thetford / Beazell | Shelby Cobra | Herb W. Byrne | 2:19.900 | 2:19.9000 |
| 33rd | 82 | Theodoracopulos / Posey / Haynes | Alfa Romeo GTA | Harry Theodoracopulos | 2:20.000 | 2:20.0000 |
| 34th | 63 | Grossman / Krinner | Shelby GT350 | Dockery Ford, Inc. | 2:20.200 | 2:20.2000 |
| 35th | 54 | Ryan / Bencker | Porsche 911 S | RBM Motors | 2:21.700 | 2:21.7000 |
| 36th | 21 | Yates / Krueger | Dodge Dart | Brock Yates | 2:22.800 | 2:22.8000 |
| 37th | 16 | Chitwood / McClure | Chevrolet Camaro | Joie Chitwood, Sr. | 2:23.000 | 2:23.0000 |
| 38th | 19 | Heppenstall / Seeley | Ford Falcon | Howmet Corp. | 2:24.400 | 2:24.4000 |
| 39th | 72 | Richards / Cuomo / Norwood | Ford Mustang | Ring Free Oil Racing Team | 2:24.700 | 2:24.7000 |
| 40th | 46 | Robson / Rodgers / Buchman | Jaguar XKE | Richard B. Robson, Jr. | 2:26.000 | 2:26.0000 |
| 41st | 90 | Taylor / Pratt / Lyon | Alfa Romeo GTA | Del O. Taylor | 2:27.300 | 2:27.3000 |
| 42nd | 61 | Drolsom / Williamson | Porsche 911 | George P. Drolsom | 2:29.400 | 2:29.4000 |
| 43rd | 47 | Gethin / Opert / Pike | Chevron B4 BMW | Fred Opert Racing | 2:31.500 | 2:31.5000 |
| 44th | 86 | Eve / Croucher / Glenn | MGB | Kenneth G. Chambliss | 2:32.800 | 2:32.8000 |
| 45th | 73 | Tremblay / Perkins | Volvo P1800 | Dr. J. Peter Marinelli | 2:38.300 | 2:38.3000 |
| 46th | 22 | Karmatz / Caldwell | Plymouth Barracuda | JoKar Racing Associates | 2:38.600 | 2:38.6000 |
| 47th | 85 | Goodman / Baker | Alfa Romeo GTA | Jim Baker | 2:40.000 | 2:40.0000 |
| 48th | 45 | Canada / Hines, Jr. / Kelly | Triumph TR4 | Joe C. Hines, Jr. | 2:40.600 | 2:40.6000 |
| 49th | 48 | Burr / Owen / Cavin | Triumph TR4 | Tim Burr (Atlas Van Lines) | 2:42.000 | 2:42.0000 |
| 50th | 71 | Taylor / Drolet / Guthrie | Ford Mustang | Ring Free Oil Racing Team | 2:42.600 | 2:42.6000 |
| 51st | 44 | Stoutenburg / Taylor / McCluskey | Triumph TR4A | Raymond Stoutenburg | 2:43.200 | 2:43.2000 |
| 52nd | 74 | Mollin / Riley | Volvo 122 S | Arthur Mollin Racing Ent. | 2:43.200 | 2:43.2000 |
| 53rd | 96 | Mims / Dietrich | ASA 411 | Jim Baker | 2:44.800 | 2:44.8000 |
| 54th | 42 | Somner / Levetto | Triumph TR4A | Cannons Auto Service | 2:45.700 | 2:45.7000 |
| 55th | 75 | Maxwell / Martin | Volvo 122 S | Dr. I. A. Maxwell, Jr. | 2:46.500 | 2:46.5000 |
| 56th | 89 | Bremer / Kearney / Turner | Ford Cortina Lotus | Ross L. Bremer | 2:46.700 | 2:46.7000 |
| 57th | 43 | Kelder / Dube | Triumph TR4A | Cannons Auto Service | 2:47.000 | 2:47.0000 |
| 58th | 84 | Ganger / Weaver / Goodman | MGB GT | Richard N. Ganger | 2:49.000 | 2:49.0000 |
| 59th | 77 | Bentley / Beddow | Alfa Romeo GTA | Precision Auto, Inc. | 2:50.100 | 2:50.1000 |