(Race Results)
| Pos. | No. | Drivers | Car | Entrant | Laps | Distance | Km/h | Pos. | Gr. |
| 1st | 2 | Rodriguez / Oliver | Porsche 917 K | J. W. Automotive Engineering | 688 | 4218.5420 kms | 175.6551 | 1st | S |
| 2nd | 23 | Bucknum / Adamowicz | Ferrari 512 S Spyder | North American Racing Team | 687 | | | 2nd | S |
| 3rd | 6 | Donohue / Hobbs | Ferrari 512 M spec. | Penske-White Racing | 674 | | | 3rd | S |
| 4th | 11 | DeLorenzo / Yenko / Mahler | Chevrolet Corvette C3 | Owens Corning Fiberglass | 613 | | | 1st | GT+2.5 |
| 5th | 21 | Garcia-Veiga / Chinetti, Jr. / De Cadenet | Ferrari 312 P/71 | North American Racing Team | 584 | | | 1st | P |
| 6th | 57 | Heinz / Costanzo | Chevrolet Corvette C3 | David Heinz Racing, Inc. | 581 | | | 2nd | GT+2.5 |
| 7th | 5 | Duval / Nicholas / Bailey | Porsche 914/6 | Sun Oil Company | 579 | | | 1st | GT2.5 |
| 8th | 19 | Behr / Buffum / Kremer | Porsche 914/6 | Ralph Meaney | 571 | | | 2nd | GT2.5 |
| 9th | 31 | Everett / Locke / Netterstrom | Porsche 911 T | Locke Lake Colony | 570 | | | 3rd | GT2.5 |
| 10th | 50 | Greenwood / Barker / Lang | Chevrolet Corvette | John Greenwood | 554 | | | 3rd | GT+2.5 |
| 11th | 17 | Gimondo / Dietrich | Chevrolet Camaro II Z/28 | Tokondo Racing | 542 | | | 1st | T |
| 12th | 45 | Baker / Grossman / Brown / Reynolds | Chevron B16 Ford | Baker Motor Company | 534 | | | 2nd | P |
| 13th | 42 | Garcia / Sereix / Small | Chevrolet Camaro Z/28 | Garcia Racing Jose M. Garcia | 527 | | | 2nd | T |
| 14th | 10 | Walle / Sherwin | Porsche 911 S | Walle Enterprises | 498 | | | 4th | GT2.5 |
| 15th | 43 | Hanrioud / Sage | Chevron B16 Ford | Jean-Pierre Hanrioud | 488 | | | 3rd | P |
| 16th | 44 | Hindson / Noah / Bunker | Porsche 911 T | Art Bunker | 488 | | | 5th | GT2.5 |
| 17th | 51 | Gammon / Donley / Garza | MGB GT | Waldron Motors Racing Team | 483 | | | 6th | GT2.5 |
| 18th | 64 | Luebbe / Baechle / Orr | Chevrolet Corvette | Robert Luebbe | 469 | | | 4th | GT+2.5 |
| 19th | 89 | Brimble / Smith | Chevrolet Camaro | H. Houghton Smith | 452 | | | 3rd | T |
| 20th | 72 | Mitchell / Kemp | Chevrolet Camaro | Robert R. Mitchell | 408 | | | 4th | T |
Did not finish:
| No. | Drivers | Car | Entrant | Laps | Distance | Km/h | Reason | Gr. |
| 18 | Meaney / Bean / Wright | Porsche 914/6 | Ralph Meaney | 470 | | | DNF | GT2.5 |
| 3 | Marko / Lins | Porsche 917 K | Martini & Rossi Racing Team | 462 | | | Accident | S |
| 33 | McComb / Tullius | Ford Mustang | John McComb | 395 | | | Head gasket | T |
| 36 | Matzen / Heyser / Sears | Ford Mustang | Racing Specialties Co. | 369 | | | Head gasket | T |
| 16 | Keyser / Beasley / Jennings | Porsche 911 S | Toad Hall Racing | 337 | | | Engine | GT2.5 |
| 52 | Scott / Lanier / Houser | MGB GT | Waldron Motors Racing Team | 311 | | | DNF | GT2.5 |
| 97 | Stumes / Cummings | Shelby GT350 | Susan Trumbull Cummings | 306 | | | DNF | T |
| 4 | Elford / van Lennep | Porsche 917 K | Martini & Rossi Racing Team | 274 | | | Accident | S |
| 59 | Gregg / Haywood | Porsche 914/6 | Brumos Porsche Audi Corp | 260 | | | Engine | GT2.5 |
| 98 | Matthews / Savage / Ongais | Ford Mustang | Ed Matthews | 238 | | | Head gasket | T |
| 47 | Tremblay / McDill / Beatty | Chevrolet Camaro I | Bruce Behrens Racing | 230 | | | DNF | T |
| 88 | Mastandrea / Lilly | Chevrolet Camaro Z/28 | Norberto Mastandrea | 215 | | | DNF | T |
| 22 | Revson / Posey / Parsons / Chinetti, Jr. | Ferrari 512 M | North American Racing Team | 202 | | | Engine | S |
| 15 | Kirill / Tisdelle | Porsche 911 S | K&T Enterprises | 163 | | | Engine | GT2.5 |
| 28 | Merzario / Juncadella | Ferrari 512 S | Escuderia Montjuich | 161 | | | Fuel pump | S |
| 70 | Belperche / Davidson | Triumph GT6 | William A. Davidson | 157 | | | DNF | GT2.5 |
| 14 | Canada / Hines, Jr. / Pickett | Chevrolet Camaro Z/28 | Boykin Auto Repairs | 137 | | | Engine | GT+2.5 |
| 26 | Gosselin / de Fierlant | Ferrari 512 S | Jacques Swaters | 124 | | | Oil pressure | S |
| 92 | Cordts / Pike | Pontiac Firebird | B.F. Goodrich Tire Co. | 121 | | | DNF | T |
| 1 | Siffert / Bell | Porsche 917 K | J. W. Automotive Engineering | 113 | | | Engine | S |
| 79 | Lawrence / Moore / Bishop | Shelby GT350 | Danny L. Moore | 106 | | | DNF | T |
| 8 | Nehl / Perry | Porsche 911 S | American Racing Promotions | 88 | | | Accident | GT2.5 |
| 12 | Thompson / Mahler | Chevrolet Corvette C3 | Owens Corning Fiberglass | 83 | | | Timing chain | GT+2.5 |
| 40 | Hochreuter / Bartling | Porsche 911 | Fritz Hochreuter | 58 | | | DNF | GT2.5 |
| 48 | Dobkin / Maynard / Oliver | Chevrolet Camaro I | S-Car-Go-Racing | 37 | | | Brakes | T |
| 74 | Straub / Brown | Ford Mustang | Al Straub | 35 | | | Accident | T |
| 20 | Gregory / Young | Ferrari 512 M | Young American Racing/North American Racing Team | 16 | | | Engine | S |
| 91 | Noseda / Nunez | Chevrolet Camaro Z/28 | Larrauri Racing | 9 | | | Gearbox | T |
Did not start:
| No. | Drivers | Car | Entrant | Reason | Gr. |
| 75 | Pettey / Bock | Ford Mustang | Reventlow-Pettey Automobiles | | T |
| 46 | Rinzler / Christian / Fraser / Baker | Chevron B16 Ford | Baker Motor Company | | P |
Did not qualify:
| No. | Drivers | Car | Entrant | Reason | Gr. |
| 55 | Clark / Kearney | Datsun 510 | Clearwater Datsun | | T |
| 65 | Rhindress / Clark | Lancia Fulvia HF | Homeline Corp. | | GT2.5 |
| 93 | Whitaker / Tunstall / Reed | Volvo P1800 | Donald S. Wright | | GT2.5 |
| 73 | Lewis / Fairbrother | Ford Cortina GT | Robert E. Lewis | | T |
| 38 | Fleming / Johnson / Barnes | Fiat 124 Sport Coupe | Simone N. Fleming | | T |
| 41 | Taylor / Goldrich / Dyer / Goldleaf | Alfa Romeo GTV | Del Taylor | | GT2.5 |
| 35 | Wilson / Collins | Chevrolet Camaro | Collins-Wilson Racing Ent. | | T |
| 77 | Marcus / Dent | BMW 2002 | Grand Prix Motors | | T |
| 37 | Johnson / Mims / Wetzel / Nagel | Chevrolet Vega | Yenko Sportscars, Inc. | | T |
| 80 | Lieb / Drolet / Daroff | Dodge Dart | Fred Lieb | | T |
| 81 | Tillson / Oest / Junco | Lancia Fulvia Rallye | Dieter R. Oest | | T |
| 87 | Elliott / Gwynne | Chevrolet Camaro | Preston Hood Chevrolet | Engine in practice | T |
Practiced:
| Pos. | No. | Drivers | Car | Entrant | Laps | Distance | Km/h | Reason | Pos. | Gr. |
| T | Vic Elford | Porsche 917 K | Martini & Rossi Racing Team | | | | T-car | | S |
| T | Rodriguez / Oliver / Siffert / Bell | Porsche 917 K | J. W. Automotive Engineering | | | | T-car | | S |
Entered cars that did not arrive:
| No. | Drivers | Car | Entrant | Reason | Gr. |
| 7 | Drolsom / Campbell | Porsche 911 S | George Drolsom | | GT2.5 |
| 9 | Soler-Roig / George | Porsche 917 K | Escuderia Nacional CS | | S |
| 24 | De Cadenet / Weir | Ferrari 365 GTB/4 | North American Racing Team | | GT+2.5 |
| 25 | Cluxton / Tatum | Ferrari Dino 246 GT | North American Racing Team | | GT2.5 |
| 26 | Parkes / Bonnier | Ferrari 512 M | Scuderia Filipinetti | | S |
| 30 | Cuomo / Gimbel | Ford Mustang | Ray Cuomo Racing Ent. Ltd. | | T |
| 71 | Weir / De Cadenet | Ford GT40 | Team Snake Speed | Written off in testing | S |
| 86 | Gottlob / Lowther | Chevrolet Corvette | Cliff Gottlob | | GT+2.5 |
| 94 | Wright / Myers / Prasek / Turnstall | MGB | Donald S. Wright | | GT2.5 |
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