| 1st | 99 | Stommelen / Hezemans / Gregg | Porsche 935/77A | JMS Brumos Porsche | 680 | 4202.3188 kms | 175.0049 | | 1st | GTX | 1st | Div.2/Gr.5 |
| 2nd | 6 | Barbour / Schurti / Rutherford | Porsche 935/77A | Dick Barbour Performance | 650 | | | | 2nd | GTX | 2nd | Div.2/Gr.5 |
| 3rd | 58 | Febles / Poole | Porsche 911 Carrera RSR 3.0 | Diego Febles Racing | 645 | | | | 1st | GTO | | |
| 4th | 33 | Fernandez / Paul / Currin | Porsche Carrera RSR | Boricua Racing | 637 | | | | 2nd | GTO | | |
| 5th | 14 | Brambring / Schornstein / "Winter" | Porsche 935 K2 | Kremer Porsche Racing | 635 | | | | 3rd | GTX | 3rd | Div.2/Gr.5 |
| 6th | 09 | Belcher / Bundy / Holbert | Porsche 934/5 | Belcher Racing | 632 | | | Fuel pump | 4th | GTX | | |
| 7th | 32 | Earle / Akin / Knoop | Porsche 911 Carrera RSR | Earle/Akin Racing Associates Inc. | 632 | | | | 5th | GTX | 4th | Div.2/Gr.5 |
| 8th | 65 | Morton / Adamowicz / Sahlman / Carradine | Ferrari 365 GTB/4 | Carradine/Dan Ward Racing | 622 | | | | 3rd | GTO | 5th | Div.2/Gr.5 |
| 9th | 59 | Gregg / Ballot-Léna / Frisselle | Porsche 935 | JMS Brumos Porsche | 621 | | | | 6th | GTX | 6th | Div.2/Gr.5 |
| 10th | 13 | Shaw, Jr. / Busby / Meister | Porsche 935 | Bankrupt Inc Racing | 608 | | | | 7th | GTX | 7th | Div.2/Gr.5 |
| 11th | 01 | White / Mesnick / Roehrig | Porsche 911 S | Roehrig Racing | 604 | | | Engine | 1st | GTU | | |
| 12th | 34 | Drolsom / Davenport / Greb | Porsche 911 S | Drolsom Racing Inc. | 592 | | | | 2nd | GTU | | |
| 13th | 21 | Konrad / Jöst / Merl | Porsche 935 | Joest | 590 | | | | 8th | GTX | 8th | Div.2/Gr.5 |
| 14th | 08 | Wolters / Refenning / Mummery | Porsche 911 S | Terry Wolters | 584 | | | | 3rd | GTU | | |
| 15th | 24 | Frank / Bergstrom | Porsche Carrera RSR | Executive Industries | 580 | | | | 9th | GTX | | |
| 16th | 84 | Doyle / Maffucci / Speakman | Datsun 260Z | World Parts | 577 | | | | 4th | GTU | | |
| 17th | 60 | Thomas / Tilton / Bond | Porsche 911 | R&R Racing | 551 | | | | 5th | GTU | | |
| 18th | 29 | Weiss / Alsup / Follmer | Porsche 911 S | Richard C. Weiss Racing Ent. | 550 | | | | 6th | GTU | | |
| 19th | 37 | Buchler / Johnson / Young | Chevrolet Camaro | Clay Young | 550 | | | | 10th | GTX | | |
| 20th | 46 | DeNarvaez / Naon / Garcia | Porsche 911 Carrera RSR | Mauricio DeNarvaez | 547 | | | DNF | 4th | GTO | | |
| 21st | 22 | Harriss / Bruckmann | Porsche 911 E | Music City P&A | 546 | | | | 7th | GTU | | |
| 22nd | 5 | Migault / Guitteny / Young | Ferrari 365 GT4/BB | Grand Competition Cars Inc. | 521 | | | | 11th | GTX | 9th | Div.2/Gr.5 |
| 23rd | 68 | Mendez / Gonzalez / Ferrer | Porsche 911 Carrera RSR 3.0 | Luis Mendez | 509 | | | | 5th | GTO | | |
| 24th | 91 | Bondurant / Cook / Southern | Datsun 260Z | Bondurant School | 508 | | | | 8th | GTU | | |
| 25th | 78 | Hillin / Henderson / Turner | Ferrari 365 GTB/4 | Western Motor Works | 506 | | | | 6th | GTO | | |
| 26th | 9 | Goellnicht / Marina / May / Arutunoff | Lancia Stratos | Automobiles International | 505 | | | | 9th | GTU | | |
| 27th | 94 | Henn / Sahlman / Satullo | Ferrari 365 GTB/4 | Swap Shops | 502 | | | Accident | 7th | GTO | | |
| 28th | 36 | Case / Panaccione | Porsche 911 | Case Racing | 500 | | | | 10th | GTU | 1st | Div.1/Gr.5 |
| 29th | 53 | Downing / Fisher / Bohren / Mandeville | Mazda RX-3 | Mazda Auto Tokyo Co. Ltd. | 498 | | | | 11th | GTU | 2nd | Div.1/Gr.5 |
| 30th | 61 | Akaike / Cosentino | Mazda RX-3 | Faza Squadra | 498 | | | | 12th | GTU | | |
| 31st | 38 | McDill / Meldeau | Chevrolet Camaro | Meldeau Tire Co. | 497 | | | | 12th | GTX | | |
| 32nd | 10 | Church / Kump / Lee | AMC AMX | Bob's Speed Products | 481 | | | | 8th | GTO | | |
| 33rd | 50 | Kleinschmidt / Culpepper | MGB GT | Native Tan | 477 | | | | 13th | GTU | | |
| 34th | 77 | Johnson / Shaw / Woodward | AMC Hornet AMX | Levi's Team Highball | 475 | | | | 9th | GTO | | |
| 35th | 7 | Heimrath / Bienvenue / Ridgely | Porsche 935 | Heimrath Racing | 466 | | | Accident | 13th | GTX | | |
| 36th | 07 | Cowart / Mendez / Castellano | Porsche Carrera RSR | Morrison's Porsche | 459 | | | DNF | 10th | GTO | | |
| 37th | 82 | Solomone / Lang / Fyhrie | Chevrolet Camaro | Carm Solomone | 456 | | | DNF | 14th | GTX | | |
| 38th | 15 | Beilcke / Grinbold / Gebhardt | BMW 3.0 CSL | Bavarian Motors Inc. | 427 | | | DNF | 15th | GTX | | |
| 39th | 55 | Rodriguez / Cruz | Lotus Europa Ford | Emiliano Rodriguez | 402 | | | | 14th | GTU | | |
| 40th | 95 | Haywood / Hagestad / Bundy | Porsche 935 | Bob Hagestad | 400 | | | Clutch | 16th | GTX | | |
| 41st | 18 | Gauthier / Swanson / West | Chevrolet Camaro | Ours & Hours Racing | 395 | | | | 17th | GTX | | |
| 42nd | 56 | Valentine / Carter / Edwards | Chevrolet Camaro | Carter Bros. Racing | 361 | | | | 18th | GTX | | |
| 43rd | 87 | Vazquez / Oyler / Hamilton / Hamilton / Seipolt | Porsche 911 | Pedro Vazquez | 360 | | | | 15th | GTU | | |
| 44th | 02 | Neland / Levenson / Brown | Chevrolet Corvette | Al Levenson | 353 | | | | 11th | GTO | | |
| 45th | 52 | Katayama / Terada / Mandeville | Mazda RX-3 | Mazda Auto Tokyo Co. Ltd. | 271 | | | DNF | 16th | GTU | | Div.1/Gr.5 |
| 46th | 19 | Cord / Adams | Chevrolet Monza | Chris Cord Racing | 261 | | | Engine | 19th | GTX | | |
| 47th | 73 | Howey / Koch / Crabtree | Chevrolet Camaro | Howey Farms | 259 | | | DNF | 20th | GTX | | |
| 48th | 76 | Thomas / Mueller / Blackburn | Porsche 911 | Quality Inn of Boise, ID | 224 | | | DNF | 17th | GTU | | |
| 49th | 72 | Thompson / Hagan / Schmidt | Chevrolet Corvette | Bill Arnold Racing | 169 | | | DNF | 21st | GTX | | |
| 50th | 20 | Bostyan / Thompson / Yenko | Chevrolet Corvette | Richard Bostyan | 152 | | | DNF | 12th | GTO | | |
| 51st | 25 | Miller / Miller | BMW 3.5 CSL | KWM Racing | 125 | | | Engine | 13th | GTO | | |
| 52nd | 05 | Bond / Kreider / Dann | Chevrolet Monza | Dale Kreider Racing | 123 | | | Wheel | 22nd | GTX | | |
| 53rd | 8 | Besenzoni / Dal Ben / Wever | Ferrari 308 GTB | Jolly Club | 117 | | | Electrics | 14th | GTO | | Div.2/Gr.5 |
| 54th | 48 | Carusso / Donaldson / Sereix | Chevrolet Corvette | Autodyne | 90 | | | Suspension | 15th | GTO | | |
| 55th | 80 | Adams / Bedard / Thomson | Oldsmobile Cutlass | Herb Adams | 89 | | | Gearbox | 16th | GTO | | |
| 56th | 0 | Ongais / Field / Minter | Porsche 935/77A | Interscope Racing | 88 | | | Engine | 23rd | GTX | | Div.2/Gr.5 |
| 57th | 12 | Wollek / Pescarolo / Jaunet | Porsche 935/77A | Porsche Kremer Racing | 86 | | | Engine | 24th | GTX | | Div.2/Gr.5 |
| 58th | 51 | Hotchkis / Kirby / Aase | Porsche 911 | Wynn's International | 85 | | | Engine | 18th | GTU | | |
| 59th | 4 | Mallet / Bondurant / Romolotti | Ferrari 308 GTB | Jolly Club | 82 | | | Transmission | 17th | GTO | | |
| 60th | 03 | Rice / Levetto | Chevrolet Camaro | Guido Levetto | 79 | | | Suspension | 18th | GTO | | |
| 61st | 54 | Tunstall / Behr / Timolat | Porsche Carrera RSR | T&C/Big Apple Racing | 70 | | | Flywheel | 25th | GTX | | |
| 62nd | 39 | Pickett / Bonnet / Canepa | Porsche Carrera RSR | Pickett Racing | 67 | | | Ignition | 19th | GTO | | |
| 63rd | 27 | Honegger / Scott / Hutchins | Mazda RX-3 | Z&W Enterprises | 57 | | | DNF | 19th | GTU | | |
| 64th | 2 | Hobbs / Peterson | BMW 320i Turbo | McLaren North America | 47 | | | Engine | 26th | GTX | | Div.2/Gr.5 |
| 65th | 17 | Fillingham / Chitwood / Jones | Chevrolet Nova | Tim Chitwood | 45 | | | Accident | 20th | GTO | | |
| 66th | 3 | Finotto / Facetti | Porsche 935 | Jolly Club | 6 | | | Engine | 27th | GTX | | Div.2/Gr.5 |
| 67th | 85 | Hulen / Coupland / Engels | Porsche 914/6 | John E. Hulen | 0 | | | Engine at start | | GTU | | |