(Race Results)
| Pos. | No. | Drivers | Car | Entrant | Laps | Distance | Km/h | Reason | Pos. | Gr. |
| 1st | 6 | Donohue / Parsons | Lola T70 Mk.3B GT Chevrolet | Roger Penske Racing | 626 | 3838.3821 kms | 159.7564 | | 1st | S5.0 |
| 2nd | 8 | Leslie / Motschenbacher | Lola T70 Mk.3 GT Chevrolet | American International Racing | 596 | 3650.5229 kms | | | 2nd | S5.0 |
| 3rd | 26 | Titus / Ward | Pontiac Firebird | Jon Ward Racing Ent. | 591 | 3619.8650 kms | | | 1st | T5.0 |
| 4th | 20 | Adamowicz / Jennings / Wetanson | Porsche 911 T | P.A.R.T. | 583 | | | | 1st | GT2.0 |
| 5th | 14 | Everett / Johnson / Coleman | Porsche 911 | Fine Grinding Co. | 581 | | | | 1st | T2.0 |
| 6th | 39 | Kleinpeter / Gunn / Beatty | Chevron B8 BMW | Raceco of Miami | 579 | | | | 1st | S2.0 |
| 7th | 9 | Patrick / Jordan | Lola T70 Mk.3 GT Chevrolet | American International Racing | 578 | | | | 3rd | S5.0 |
| 8th | 47 | Williamson / Drolsom | Porsche 911 | Dr. Harold Williamson | 577 | | | | 2nd | T2.0 |
| 9th | 68 | Duval / Nicholas | Porsche 911 T/R | Jacques Duval | 571 | | | | 2nd | GT2.0 |
| 10th | 48 | Wicky / Garant | Porsche 911 T | Wicky Racing Team | 569 | | | | 3rd | GT2.0 |
| 11th | 97 | Maglioli / Pinto | Lancia Fulvia HF Zagato | Algar Enterprises | 566 | | | | 1st | P2.0 |
| 12th | 5 | Grossman / Dini | Chevrolet Camaro | Randy's Auto Body | 549 | | | | 2nd | T5.0 |
| 13th | 28 | Corwin / Manner / Baird | Chevrolet Camaro | Flem-Cor Ent. | 549 | | | | 3rd | T5.0 |
| 14th | 86 | Harrison / Ryan | Porsche 911 | RBM Motors | 548 | | | | 3rd | T2.0 |
| 15th | 61 | Gregory / Broström | Porsche 910 | Sportscars Unlimited Switzerland | 544 | | | | 2nd | S2.0 |
| 16th | 96 | Drolet / Tremblay / Gimondo / Belperche | Chevrolet Corvette | Zorian Productions, Ltd. | 532 | | | | 1st | GT+5.0 |
| 17th | 83 | Baker / Baker / Richards | Austin-Healey Sprite | MacMillan Ring Free | 527 | | | | 2nd | P2.0 |
| 18th | 4 | McDaniel / Pieper / Scott | Zink VSR Volkswagen | HRH Corp. | 519 | | | | 3rd | P2.0 |
| 19th | 55 | Gammon / Mummery | MGB | Waldron Motors | 508 | | | | 4th | GT2.0 |
| 20th | 62 | Bartling / Hochreuter / Brezinka | Porsche 906 | Rainer Brezinka | 507 | | | | 3rd | S2.0 |
| 21st | 18 | Carter / Adams | Chevrolet Camaro | Maurice Carter Chevrolet | 501 | | | | 4th | T5.0 |
| 22nd | 32 | Rose / Richards | Chevrolet Camaro | Harold Rose | 499 | | | | 5th | T5.0 |
| 23rd | 41 | Posey / Rodriguez | Ferrari 275 GTB/C | North American Racing Team | 494 | | | | 1st | GT5.0 |
| 24th | 53 | Schütz / Mitter / Attwood | Porsche 908L | Porsche System Engineering | 483 | | | Camshaft drive | 1st | P3.0 |
| 25th | 79 | Riley / Mollin | Volvo 122 S | Arthur Mollin Racing | 473 | | | Accident | 4th | T2.0 |
| 26th | 1 | Oliver / Ickx | Ford GT40 | J. W. Automotive Eng. | 470 | | | Tyre => accident | 4th | S5.0 |
| 27th | 81 | Pryor / Marina | Alfa Romeo Giulia SS | Auto of Italy, Inc. | 451 | | | | 5th | GT2.0 |
| 28th | 15 | Bock / Dent | Chevrolet Camaro | Larry Drover | 449 | | | | 6th | T5.0 |
| 29th | 56 | Harris / Waldron / Scott | MGB | Waldron Motors | 428 | | | | 6th | GT2.0 |
Not classified:
| No. | Drivers | Car | Entrant | Laps | Distance | Km/h | Reason | Gr. |
| 43 | Wright / Craine | Porsche 911 | Gary Wright | 337 | | | | T2.0 |
| 98 | Hollander / Clark / Marsula | Lancia Fulvia HF Zagato | Algar Enterprises | 331 | | | | P2.0 |
Did not finish:
| No. | Drivers | Car | Entrant | Laps | Distance | Km/h | Reason | Gr. |
| 50 | Siffert / Herrmann | Porsche 908L | Porsche System Engineering | 415 | | | Camshaft drive | P3.0 |
| 2 | Hobbs / Hailwood | Ford GT40 | J. W. Automotive Eng. | 401 | | | Head gasket | S5.0 |
| 46 | Debo / Parkerson | Triumph TR4 | Bud Boles Racing | 378 | | | Engine | GT5.0 |
| 54 | Stommelen / Ahrens, Jr. | Porsche 908L | Porsche System Engineering | 313 | | | Camshaft drive | P3.0 |
| 52 | Elford / Redman | Porsche 908L | Porsche System Engineering | 277 | | | Oil pressure | P3.0 |
| 51 | Attwood / Buzzetta | Porsche 908L | Porsche System Engineering | 273 | | | Engine | P3.0 |
| 77 | Gifford / Campbell | Porsche 911 | Williams Racing Ent. | 272 | | | Clutch | T2.0 |
| 22 | Bailey / Locke / Downs | Porsche 911 | P.A.R.T. | 249 | | | Engine | T2.0 |
| 73 | Opert / Sanford | Porsche 911 | Fred Opert Racing | 223 | | | Engine | T2.0 |
| 57 | Heinz / Moerwald | MGB | David Heinz Imports | 221 | | | Axle | GT2.0 |
| 33 | McComb / Dooley | Ford Mustang | John McComb Racing | 219 | | | Engine | T5.0 |
| 91 | Mastandrea / Silvers / Ormes | Chevrolet Camaro | Mar Shipping Co. | 210 | | | Ignition | T5.0 |
| 11 | Yenko / Guldstrand | Chevrolet Camaro | Best Photo Serv. Inc. | 208 | | | DNF | T5.0 |
| 67 | Thompson / Harrell / DeLorenzo | Chevrolet Corvette Sting Ray | Owens-Corning Fiberglass Troy Promotions | 201 | | | Accident | GT+5.0 |
| 21 | Netterstrom / Kelly | Porsche 911 | P.A.R.T. | 182 | | | Engine | T2.0 |
| 58 | Soler-Roig / Lins | Porsche 907 2.2 | Escuderia Nacional CS | 158 | | | Collision | P3.0 |
| 36 | Pickett / Downs | Porsche 911 | Dr. Wilbur Pickett | 153 | | | Engine | T2.0 |
| 40 | Kolb / Biscaldi | Ferrari Dino 206 S | North American Racing Team | 152 | | | Head gasket | P2.0 |
| 17 | McClain / Costanzo | Chevrolet Camaro | David H. McClain | 145 | | | Engine | T5.0 |
| 25 | Dibos / Calabattisti | Alfa Romeo T33/2 2.5 | Dibos Ch. | 139 | | | Accident | P3.0 |
| 59 | Gregg / Axelsson | Porsche 911 | Brumos Porsche | 137 | | | Accident | T2.0 |
| 99 | Robson / Rodgers | Jaguar XKE | Coguna Motors | 116 | | | Engine | GT5.0 |
| 69 | Lowther / Esseks / Dominianni | Chevrolet Corvette | Robert D. Esseks | 109 | | | Engine | GT+5.0 |
| 93 | Cline / Pickering | Triumph GT6 | Richard Cline | 108 | | | DNF | GT2.0 |
| 72 | Hagan / McVeigh / Gillebard | Mercury Cougar | Lafayette Speed Center | 88 | | | Stalled on course | T5.0 |
| 88 | Grant / Oest / Batchin | Lancia Fulvia HF | Auto Enterprise of ChestnutHills | 79 | | | Gearbox | GT2.0 |
| 38 | Merello / Maglioli / Alvarez | Ferrari 250 LM | Team Raceco of Miami | 68 | | | Gearbox | S5.0 |
| 60 | Norinder / Bonnier | Lola T70 Mk.3B GT Chevrolet | Sportscars Unlimited Switzerland | 52 | | | Accident damage | S5.0 |
| 16 | Rafferty / Gearhart / Wisler | Chevrolet Corvette | Rafferty Racing | 48 | | | Engine | GT+5.0 |
| 92 | Jowett, Jr. / Fisher | Chevrolet Camaro | Wilton T. Jowett, Sr. | 44 | | | DNF | T5.0 |
| 66 | DeLorenzo / Lang | Chevrolet Corvette Sting Ray | Owens-Corning Fiberglass Troy Promotions | 23 | | | Fire | GT+5.0 |
| 45 | Waltman / Bird | Osca GT2 Maserati | Scuderia Autosport | 0 | | | Engine | S2.0 |
Did not start:
| No. | Drivers | Car | Entrant | Reason | Gr. |
| 19 | Buckley / Cooper | Mercury Cougar | Bud Moore | | T5.0 |
| 7 | | Ford GT40 | William Wonder, Inc. | | S5.0 |
| 24 | Servoz-Gavin / Pescarolo | Matra-Sports 630M | Matra-Sports | Accident in practice | P3.0 |
| 37 | Strickler / Wherrell | Alfa Romeo GTA | Richard E. Crebs | | T2.0 |
| 49 | Crebs / Whitaker | Alfa Romeo GTA | Richard E. Crebs | | T2.0 |
| 89 | James Hall | Dodge Dart | LeVerne Hartje | | T5.0 |
Did not practice:
| No. | Drivers | Car | Entrant | Reason | Gr. |
| 60T | | Lola T70 Mk.3 GT Chevrolet | Sportscars Unlimited Switzerland | | S5.0 |
Entered cars that did not arrive:
| No. | Drivers | Car | Entrant | Reason | Gr. |
| 38 | Fausto Merello | Ferrari 275 GTB/4 | Raceco of Miami | | GT5.0 |
| 58 | Soler-Roig / Lins / Toivonen | Porsche 908 | Escuderia Nacional CS | Raced Porsche 907 | P3.0 |
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