| 1st | 59 | Gregg / Haywood | Porsche 911 Carrera RSR 3.0 | Brumos Porsche | 684 | 4194.0151 kms | 174.6637 | | 1st | GTO | 1st | S |
| 2nd | 11 | Keyser / Sprowls / Contreras | Porsche 911 Carrera RSR 3.0 | Toad Hall | 669 | | | | 2nd | GTO | 2nd | S |
| 3rd | 23 | Kemp / Baird | Porsche 911 Carrera RSR 3.0 | Armor All | 668 | | | | 3rd | GTO | 3rd | S |
| 4th | 30 | Bienvenue / Dyer | Porsche 911 Carrera RSR 3.0 | George Dyer | 665 | | | | 4th | GTO | 4th | S |
| 5th | 4 | Webbe / Dickinson / Theodoracopulos | Porsche 911 Carrera RSR 3.0 | Bill Webbe | 623 | | | | 5th | GTO | 5th | S |
| 6th | 43 | O'Steen / Helmick / Graves | Porsche Carrera RSR | Escar | 619 | | | | 6th | GTO | 6th | S |
| 7th | 71 | Woodner / Phillips | Ferrari 365 GTB/4 | North American Racing Team | 613 | | | | 1st | Gr.4 | 1st | GT |
| 8th | 14 | Holbert / Forbes-Robinson | Porsche 911 Carrera RSR 3.0 | Porsche-Audi USA | 607 | | | Gearbox | 7th | GTO | 7th | S |
| 9th | 5 | Rojas / Rebaque / van Beuren, Jr. | Porsche 911 Carrera RSR 3.0 | Hector Rebaque | 592 | | | | 8th | GTO | 8th | S |
| 10th | 60 | Bond / Rollin / Belperche | Porsche 911 S | Rusty Bond | 567 | | | | 1st | GTU | 2nd | GT |
| 11th | 92 | Tillson / Oest | Porsche Carrera RSR | Oest/Tillson | 566 | | | | 9th | GTO | 9th | S |
| 12th | 13 | Townsend / Thomas / Papke | Porsche Carrera RSR | Randolph Townsend | 562 | | | | 10th | GTO | 10th | S |
| 13th | 34 | Drolsom / Nagel | Porsche 911 S | George Drolsom | 558 | | | | 2nd | GTU | 3rd | GT |
| 14th | 90 | Walle / Reddy | Mazda RX-3 | Ray Walle | 557 | | | | 3rd | GTU | 1st | T |
| 15th | 67 | McClain / White | Porsche 911 Carrera RSR | David McClain | 546 | | | | 11th | GTO | 11th | S |
| 16th | 44 | Freyre / Naon / Garcia | Porsche 911 S | Delta Racing | 542 | | | | 4th | GTU | 12th | S |
| 17th | 7 | Johnson / Coleman / Shaw | AMC Gremlin | Levi's Team Highball | 538 | | | | 12th | GTO | 2nd | T |
| 18th | 85 | Hulen / Coupland / Engels | Porsche 914/6 | John E. Hulen | 528 | | | | 5th | GTU | 4th | GT |
| 19th | 18 | Thompson / Bach / Yenko | Chevrolet Corvette C3 | Jerry Thompson | 517 | | | DNF | 13th | GTO | 5th | GT |
| 20th | 32 | Mroz / Mroz | Ford Mustang | Roaring Moose | 497 | | | | 14th | GTO | 3rd | T |
| 21st | 73 | Arnold / Biernerth | Chevrolet Corvette C2 | Bill Arnold | 450 | | | | 15th | GTO | 6th | GT |
| 22nd | 26 | Williamson / Cosentino / Gano | Chevrolet Camaro | Al Cosentino | 441 | | | | 16th | GTO | 4th | T |
| 23rd | 45 | Ramirez / Mutiz / Montalvo / Alvarez | Porsche 911 S | Delta Racing | 435 | | | DNF | 6th | GTU | 7th | GT |
| 24th | 12 | Hughes / Whitaker / Geisel | Datsun 510 | Precision Performance | 435 | | | | 7th | GTU | 5th | T |
| 25th | 41 | Jones, Jr. / Currin / Faul | Chevrolet Camaro II | Herb Jones, Jr. | 427 | | | Engine | 17th | GTO | 6th | T |
| 26th | 29 | Mabrito / Steel | Datsun 240Z | Bruce Mabrito | 420 | | | | 8th | GTU | | GT |
| 27th | 95 | de Izaurieta / Tabe / Martinez | Porsche Carrera | Hector Rebaque | 407 | | | DNF | 18th | GTO | | S |
| 28th | 0 | Minter / Ballot-Léna / Gagliardi | Ferrari 365 GTB/4 | North American Racing Team | 392 | | | Drive shaft | 19th | GTO | | GT |
| 29th | 98 | Alspaugh / Persinger | Chevrolet Corvette C3 | James W. Persinger | 392 | | | | 20th | GTO | | GT |
| 30th | 88 | Carter / Felton | Chevrolet Camaro II | Carter Racing Services | 346 | | | Accident | 21st | GTO | | T |
| 31st | 27 | Ward / Henny / Barnett | Chevrolet Camaro II | Jon Ward | 303 | | | DNF | 22nd | GTO | | GT |
| 32nd | 46 | Buzbee / Ross / Frates | Datsun 240Z | Spencer Buzbee | 275 | | | DNF | 9th | GTU | | GT |
| 33rd | 24 | Posey / Stuck | BMW 3.0 CSL | BMW of America | 274 | | | Engine | 23rd | GTO | | T |
| 34th | 64 | Canada / Boykin / Levetto | Chevrolet Camaro I | Russ Boykin | 255 | | | DNF | 24th | GTO | | T |
| 35th | 56 | Jones / Mignot / Grandet | Ferrari 365 GTB/4 | North American Racing Team? | 238 | | | Oil leak | 25th | GTO | | GT |
| 36th | 51 | Jones / Kirby / Hotchkis | Porsche 914/6 | Johnson-Bozzoni Porsche-Audi | 229 | | | Engine | 10th | GTU | | GT |
| 37th | 83 | Mollin / Gatoff / Riley | Volvo 142 | Arthur Mollin | 219 | | | DNF | 11th | GTU | | T |
| 38th | 17 | Gimondo / Heinz / Everett | Chevrolet Camaro II | Takondo Racing | 201 | | | Oil cooler | 26th | GTO | | T |
| 39th | 9 | Bolanos / Heyer / Jourdain | Porsche Carrera RSR 3.0 | Juan Carlos Bolanos | 191 | | | Engine | 27th | GTO | | S |
| 40th | 89 | Parish / Countryman / Secher | Porsche 911 S | Barrick Motor Racing | 158 | | | DNF | 12th | GTU | | GT |
| 41st | 84 | Selbert / Biggs | Porsche 911 S | Klaus Selbert | 151 | | | DNF | 13th | GTU | | GT |
| 42nd | 75 | Greenwood / Muzzin / Shafer | Chevrolet Corvette C3 | John Greenwood | 148 | | | Accident | 28th | GTO | | GT |
| 43rd | 87 | DeLorenzo / Brown / Carter | Chevrolet Camaro II | Carter Racing Services | 125 | | | Accident | 29th | GTO | | T |
| 44th | 28 | Arutunoff / Goellnicht / Gebhardt | Lotus Europa | Anatoly Arutunoff | 114 | | | Head gasket | 2nd | Gr.4 | | GT |
| 45th | 15 | Garcia / Garcia | Chevrolet Corvette C3 | Garcia Racing | 110 | | | DNF | 30th | GTO | | GT |
| 46th | 42 | Carusso / Vreeland | Chevrolet Corvette C3 | John Carusso | 59 | | | Engine | 31st | GTO | | GT |
| 47th | 110 | Nehl / Moise | Chevrolet Camaro II | Automotive Engineering | 41 | | | | 32nd | GTO | | T |
| 48th | 16 | Spruell / Bean | Porsche 911 S | Bill Bean | 35 | | | | 14th | GTU | | GT |
| 49th | 72 | Jimenez | Mazda RX-2 | Cafe Mexicana Racing | 34 | | | DNF | 15th | GTU | | T |
| 50th | 25 | Peterson | BMW 3.0 CSL | BMW of America | 29 | | | Engine | 33rd | GTO | | T |
| 51st | 1 | Ballot-Léna | Ferrari 365 GT4/BB | North American Racing Team | 0 | | | Suspension | 34th | GTO | | S |