| 1st | 9 | Garretson / Rahal / Redman | Porsche 935 K3/80 | Garretson Racing/Style Auto | 708 | 4375.3550 kms | 182.102 | | 1st | GTX | |
| 2nd | 5 | Akin / Siebert / Bell | Porsche 935 K3 | Bob Akin Motor Racing | 695 | | | | 2nd | GTX | |
| 3rd | 62 | Koll / Kline / McFarlin | Porsche 911 SC | Kegel Enterprises | 644 | | | | 1st | GTU | |
| 4th | 23 | Davenport / Carney / Johnson | Datsun 280ZX | The New Raytown Datsun | 626 | | | | 2nd | GTU | |
| 5th | 24 | Pirro / Finotto / Facetti | Lancia Beta Montecarlo Turbo | Jolly Club | 609 | | | | 3rd | GTX | -2000/Gr.5 |
| 6th | 14 | Stuck / Gebhardt / Brun | BMW M1 | Bavarian Motors International | 608 | | | | 1st | GTO | |
| 7th | 98 | Mueller / Rude / Martin | Mazda RX-7 | Kent Racing | 606 | | | | 3rd | GTU | |
| 8th | 84 | "Jamsal" / Barrientos / Gonzalez | Porsche 935 M16 | Scorpio Racing Team | 595 | | | | 4th | GTX | |
| 9th | 55 | Mandeville / Johnson / Febles | Mazda RX-7 | Mandeville Racing Team | 595 | | | | 4th | GTU | |
| 10th | 7 | Bohren / Mullen / Roehrig | Mazda RX-7 | Kent Racing | 589 | | | | 5th | GTU | |
| 11th | 50 | Hoerr / Hoerr / Downing | Mazda RX-7 | Downing/Maffucci Racing | 585 | | | | 6th | GTU | |
| 12th | 58 | Smith / Kendall / Earle | Porsche Carrera RSR | Charles Kendall | 585 | | | | 2nd | GTO | |
| 13th | 45 | Speer / Mitchell / Ratcliff | Porsche 914/6 | Autosport Technology | 581 | | | | 7th | GTU | |
| 14th | 07 | Heimrath / Heimrath, Jr. | Porsche 935 | Heimrath Racing | 575 | | | | 5th | GTX | |
| 15th | 34 | Drolsom / Hoskins / Johnson | Porsche 911 Carrera | Drolsom Racing | 563 | | | | 3rd | GTO | |
| 16th | 2 | Hobbs / Surer / Quester | BMW M1 | BMW Motorsport | 555 | | | | 6th | GTX | +2000/Gr.5 |
| 17th | 27 | Southard / Kjoller / Kjoller | Porsche Carrera | Southard Motor Racing | 548 | | | | 4th | GTO | |
| 18th | 3 | Patrese / Heyer / Pescarolo | Lancia Beta Montecarlo Turbo | Martini Lancia Racing | 545 | | | | 7th | GTX | -2000/Gr.5 |
| 19th | 42 | Northam / Kuhel / Neland | Chevrolet Camaro | Mac's Bar Spec./Kend Co. | 532 | | | | 5th | GTO | |
| 20th | 04 | Almeida / Rodriguez / Morejon | Porsche Carrera RSR | T & R Racing | 526 | | | Engine | 6th | GTO | |
| 21st | 02 | Morton / Klausler | Ford Mustang | Firestone Tire & Rubber | 517 | | | | 8th | GTX | |
| 22nd | 36 | Miller / Bedard / McKitterick | Porsche 924 Carrera GTR Turbo | Herman & Miller P+A | 515 | | | | 7th | GTO | |
| 23rd | 82 | Bergstrom / Casey / Cook | Mazda RX-7 | Trinity Racing | 513 | | | DNF | 8th | GTU | |
| 24th | 51 | Stommelen / Grohs / Meister | Porsche 935 M16 | Andial Racing/Meister Homes | 500 | | | Electrics => fire | 9th | GTX | |
| 25th | 16 | Burt / Grunnet / Paquette | Mazda RX-7 | Corp Racing Ltd. | 471 | | | | 9th | GTU | |
| 26th | 52 | Cripe / Gauthier / Swanson | Porsche 911 | Beach Ball Racing | 450 | | | | 10th | GTU | |
| 27th | 43 | Young / Jones / Gregg | Porsche Carrera | Bob Gregg Racing | 446 | | | | 8th | GTO | |
| 28th | 81 | Winters / Dietrich / Alsop | Mazda RX-7 | Trinity Racing | 429 | | | | 11th | GTU | |
| 29th | 70 | Doyle / Phipps / Overby | Mazda RX-7 | Chris Doyle | 429 | | | | 12th | GTU | |
| 30th | 46 | Espinosa / DeNarvaez / Cortes | Porsche 911 Carrera RSR | DeNarvaez Ent. | 385 | | | | 9th | GTO | |
| 31st | 65 | Adamowicz / Knoop | Ferrari 512 BB | Prancing Horse Farms Racing | 373 | | | Accident | 10th | GTX | |
| 32nd | 01 | Brunn / Kirby / Hotchkis | Porsche Carrera RSR | Kirby-Hitchcock Racing | 361 | | | DNF | 10th | GTO | |
| 33rd | 25 | Miller / Cowart / Londono | BMW M1 | Red Lobster Racing | 346 | | | Engine | 11th | GTO | |
| 34th | 30 | Moretti / Mendez / DeNarvaez | Porsche 935J | Momo/Penthouse | 339 | | | Accident | 11th | GTX | |
| 35th | 57 | Scott / Goodell / Bruckmann | Porsche 914/6 | Personalized Autohaus | 339 | | | DNF | 13th | GTU | |
| 36th | 71 | Keirn / Engle / Boand | Chevrolet Corvette | Keirn Garage | 328 | | | Electrics | 12th | GTO | |
| 37th | 67 | Shaw / Whitman / Blackburn | AMC Spirit AMX | Levi's Team Highball | 303 | | | DNF | 13th | GTO | |
| 38th | 03 | Pallavicini / Sheldon / Crang | Porsche 934 | Angelo Pallavicini | 290 | | | DNF | 14th | GTO | |
| 39th | 0 | Field / Minter / Ongais | Porsche 935 K3/80 | Interscope Racing | 287 | | | Accident | 12th | GTX | |
| 40th | 11 | Holbert / Mears / Bundy | Porsche 924 Carrera GTR Turbo | Holbert Racing | 263 | | | Engine | 15th | GTO | |
| 41st | 4 | Alboreto / Ghinzani / Gabbiani | Lancia Beta Montecarlo Turbo | Martini Lancia Racing | 235 | | | Valve | 13th | GTX | -2000/Gr.5 |
| 42nd | 86 | Haywood / Barth / Leven | Porsche 935/80 | Bayside Disposal/Brumos Racing | 232 | | | DNF | 14th | GTX | |
| 43rd | 78 | Howey / Wolf / Koch | Chevrolet Camaro | Wolf Engines | 208 | | | DNF | 16th | GTO | |
| 44th | 19 | Van Every / Tisdelle / Bond | Porsche Carrera RSR | Van Every Racing | 194 | | | Accident | 17th | GTO | |
| 45th | 20 | Cord / Adams | Chevrolet Monza Turbo | Chris Cord Racing | 191 | | | DNF | 15th | GTX | |
| 46th | 80 | Carter / Wietzes / Valentine | Chevrolet Camaro | Maurice Carter Racing | 188 | | | Accident | 16th | GTX | |
| 47th | 38 | Case / Panaccione / Tilton | Porsche 911 | Case Racing | 169 | | | Gearbox | 14th | GTU | |
| 48th | 1 | Fitzpatrick / Busby / Wollek | Porsche 935 K3/80 | John Fitzpatrick Racing | 167 | | | Engine | 17th | GTX | |
| 49th | 22 | Baker / Gilliland / Harmstad | Porsche 914/4 | Personalized Autohaus | 143 | | | DNF | 15th | GTU | |
| 50th | 33 | Zitza / Zitza / Dube | Porsche 914/6 | Zotz Garage | 128 | | | DNF | 16th | GTU | |
| 51st | 17 | Beilcke / König / Walch | BMW 3.5 CSL | Bavarian Motors International | 126 | | | DNF | 18th | GTO | |
| 52nd | 37 | Romero / Gonzalez / Mendez | Porsche 935 M16 | Pepe Romero | 121 | | | Steering | 18th | GTX | |
| 53rd | 40 | Bartling / Freberg / Deacon | BMW M1 | David Deacon Racing | 118 | | | DNF | 19th | GTO | |
| 54th | 54 | Garcia / Naon / Sereix | Porsche Carrera RSR | Montura Racing | 112 | | | Engine | 20th | GTO | |
| 55th | 99 | Heinz / Gleason / Cogbill | Chevrolet Camaro | Gassaway/Oftedahl Racing | 108 | | | Accident | 21st | GTO | |
| 56th | 60 | Smith / Miller / Lee | AMC AMX | Bob's Speed Products | 87 | | | DNF | 22nd | GTO | |
| 57th | 94 | Whittington / Whittington / Whittington | Porsche 935 K3 | Whittington Brothers | 84 | | | Engine | 19th | GTX | |
| 58th | 75 | Vermeersch / Joosen / Libert | Mazda RX-7 | Z&W Enterprises | 83 | | | Differential | 23rd | GTO | |
| 59th | 6 | Merl / Mass | Porsche 935J | Joest Racing | 59 | | | Accident | 20th | GTX | +2000/Gr.5 |
| 60th | 18 | Paul / Paul, Jr. | Porsche 935 JLP-2 | JLP Racing | 53 | | | Piston | 21st | GTX | |
| 61st | 44 | Labonte / Pearson | Chevrolet Camaro | Stratagraph | 50 | | | Engine | 22nd | GTX | |
| 62nd | 87 | Stone | Porsche Carrera RSR | Bob Beasley | 48 | | | Accident | 24th | GTO | |
| 63rd | 15 | Lutz / Boone | Porsche 911 Carrera RSR | D. L. Performance Engineering | 47 | | | Accident | 25th | GTO | |
| 64th | 09 | Henn / Bondurant | Porsche 935 K3 | Thunderbird Swap Shop | 30 | | | Engine | 23rd | GTX | |
| 65th | 28 | Posey / Stiff | Datsun 280ZX | NTS Racing | 29 | | | Oil pressure | 26th | GTO | |
| 66th | 66 | Dunham / Maffucci | Mazda RX-7 | Downing/Maffucci Racing | 20 | | | DNF | 17th | GTU | |
| 67th | 49 | Speakman | Mazda RX-7 | Faza Squadra | 12 | | | DNF | 18th | GTU | |
| 68th | 06 | Halsmer | Ferrari 365 GTB/4 | Crevier Imports | 9 | | | Engine, fire | 27th | GTO | |
| 69th | 10 | Facetti | Ferrari 308 GTB Turbo | Jolly Club | 4 | | | Electrics | 24th | GTX | +2000/Gr.5 |