(Qualifying Heat Results)
Qualifying Heat: -
| Pos. | No. | Drivers | Car | Entrant | Laps | Reason |
| 1st | 6 | Mark Donohue | Porsche 917/30 TC | Sunoco Porsche Audi | 30 | |
| 2nd | 0 | Jody Scheckter | Porsche 917/10 TC | Vasek Polak Porsche Audi | 30 | |
| 3rd | 101 | Jackie Oliver | Shadow DN2 Chevrolet | U.O.P. | 30 | |
| 4th | 23 | Charlie Kemp | Porsche 917/10 TC | Royal Crown Cola | 30 | |
| 5th | 11 | Durst | McLaren M8F Chevrolet | Motschenbacher-Lucky Girl | 29 | |
| 6th | 97 | Bob Brown | McLaren M8F Chevrolet | Commander Motor Homes | 29 | |
| 7th | 98 | Danny Hopkins | McLaren M8F Chevrolet | Commander Motor Homes | 28 | |
| 8th | 39 | John Gunn | Lola T260 Chevrolet | Racing Specialties | 28 | |
| 9th | 34 | Tom Dutton | McLaren M8R Chevrolet | Burmester Racing | 24 | |
| 10th | 17 | Bob Nagel | Lola T260 Chevrolet | Thermo King-World Airways | 22 | |
| 11th | 73 | David Hobbs | McLaren M20 Chevrolet | Roy Woods Racing | 19 | |
| 12th | 8 | Scooter Patrick | McLaren M8F Chevrolet | U.S. Racing | 14 | Blown piston |
| 13th | 16 | George Follmer | Porsche 917/10 TC | Royal Crown Cola | 9 | Puncture |
| 14th | 9 | John Cordts | McLaren M8D Chevrolet | W.O.R.L.D. | 3 | |
| 15th | 59 | Hurley Haywood | Porsche 917/10 TC | Brumos Racing | 2 | Accident |
Did not start:
| No. | Drivers | Car | Entrant | Reason |
| 45 | David Saville-Peck | Costello SP7 Oldsmobile | Ennerdale Racing | |
| 57 | Monte Shelton | Lola T162 Chevrolet | Monte's Motors | |
Other listed cars, participation unknown:
| Pos. | No. | Drivers | Car | Entrant | Laps | Reason |
| 2 | Gary Wilson | McLaren M8E Chevrolet Turbo | Lee Rider | | |
| 3 | Bill Cuddy | McLaren M8E Chevrolet | William Cuddy, Jr, | | |
| 7 | Mark Donohue | Porsche 917/30 TC | Sunoco Porsche Audi | | |
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