(Qualifying Results)
| Pos. | No. | Drivers | Car | Entrant | Q Time | Km/h |
| 1st | 6 | Donohue / Hobbs | Ferrari 512 M | Roger Penske/Kirk F. White | 1:07.7400 | 207.6617 |
| 2nd | 1 | Siffert / van Lennep | Porsche 917 K | J. W. Automotive Engineering | 1:08.5100 | |
| 3rd | 40 | Ickx / Andretti | Ferrari 312 PB | S.p.A. Ferrari SEFAC | 1:08.6400 | |
| 4th | 2 | Bell / Attwood | Porsche 917 K | J. W. Automotive Engineering | 1:08.9700 | |
| 5th | 14 | Posey / Bucknum | Ferrari 512 M | North American Racing Team | 1:09.1000 | |
| 6th | 30 | de Adamich / Peterson | Alfa Romeo T33/3 | Autodelta S.p.A. | 1:09.2200 | |
| 7th | 33 | Pescarolo / Stommelen | Alfa Romeo T33/3 | Autodelta S.p.A. | 1:09.8000 | |
| 8th | 35 | Elford / Galli | Alfa Romeo T33/TT/3 | Autodelta S.p.A. | 1:11.0000 | |
| 9th | 48 | Müller / Eaton | Ferrari 512 M | Herbert Müller Racing | 1:11.5100 | |
| 10th | 63 | De Cadenet / Motschenbacher | Ferrari 512 M | Ecurie Francorchamps | 1:12.7300 | |
| 11th | 43 | Adamowicz / Cabral | Porsche 917 K | David Piper Racing | 1:15.3800 | |
| 12th | 21 | Young / Adams | Ferrari 512 M | Young American Racing Team | 1:15.5800 | |
| 13th | 36 | Galli / Elford / *de Adamich | Alfa Romeo T33/3 | Autodelta S.p.A. | 1:16.0700 | |
| 14th | 67 | Harrison / Fraser / Rinzler / Barber | Lola T212 Ford | Baker Motor Co. | 1:17.5800 | |
| 15th | 87 | Dean / Matchett / Parsons | Porsche 908/02 | A. G. Dean (Racing) | 1:18.9800 | |
| 16th | 61 | Kleinpeter / Belcher | Lola T212 Ford | Promotional Advertising | 1:20.3000 | |
| 17th | 49 | Johnson / Greenwood | Chevrolet Corvette | John Greenwood Racing | 1:21.7600 | |
| 18th | 46 | Rahal / Wise / Kroll | Porsche 906 K | Brokers Racing/Nationwide Food | 1:23.1400 | |
| 19th | 59 | Gregg / Haywood | Porsche 914/6 | Brumos Porsche-Audi | 1:24.8000 | |
| 20th | 57 | Heinz / Yenko | Chevrolet Corvette | Or Costanzo/Tri City Corvette Club | 1:25.2900 | |
| 21st | 32 | Locke / Bailey | Porsche 911 S | Locke Development Corporation | 1:26.0000 | |
| 22nd | 68 | Keating / Pentecost / Torgersen | Porsche 911 S | Baker Motor Co. | 1:26.3000 | |
| 23rd | 64 | Baechle / Summers / Kepler | Chevrolet Corvette | Bob Baechle | 1:26.3200 | |
| 24th | 50 | Hoffman / Cipelle / Greenwood | Chevrolet Corvette | John Greenwood Racing | 1:26.3400 | |
| 25th | 80 | Minter / Bartling / Hochreuter | Porsche 911 | Fritz Hochreuter | 1:26.6000 | |
| 26th | 31 | Everett / Beasley | Porsche 911 T | Locke Development Corporation | 1:28.5200 | |
| 91 | Luebbe / Orr | Chevrolet Corvette | Robert Luebbe | 1:29.1000 | |
| 70 | Kremer / Durant | Porsche 911 | Kremer Racing | 1:30.4100 | |
| 5 | Duval / Nicholas | Porsche 914/6 | Jacques Duval | 1:30.5400 | |
| 12 | Conrad / Caldwell | Porsche 914/6 | Ralph Meaney | 1:30.9700 | |
| 37 | Oest / Tillson | Porsche 911 | Holbert/Oest | 1:36.1800 | |
| 27th | 60 | Ormes / Brown / Bondurant | Lola T70 Mk.3B GT Chevrolet | Bahamas Racing | no time | |
| 28th | 16 | Keyser / Jennings | Porsche 911 T | Toad Hall Racing | no time | |
| 28th | 41 | Schumacher / McClure / Kiefer | Chevrolet Corvette | Iroquois Racing Associates | no time | |
Other present cars:
| No. | Drivers | Car | Entrant |
| T | Siffert / van Lennep / Bell / Attwood | Porsche 917 K | J. W. Automotive Engineering |
Entered cars that did not arrive:
| No. | Drivers | Car | Entrant |
| 3 | Jo Bonnier | Lola T212 Ford | Scuderia Filipinetti |
| 10 | Behr / Wright | Porsche 914/6 | Ralph Meaney |
| 11 | Cowell / Jenkins / Conrad | Porsche 914/6 | Ralph Meaney |
| 13 | Glanton / Alden | Porsche 911 S | Jim Glanton |
| 18 | Paul / Harris | Chevrolet Corvette | Es-Pa Racing |
| 22 | Baumgartner / Herman | Chevron B8 BMW | Don A. Baumgartner |
| 45 | Guillermo Ortega | Porsche 908/02 | Guillermo Ortega |
| 53 | Dumoing / Cerruti | Lola T212 Ford | Georges Dumoing |
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