| 1st | 18 | Paul, Jr. / Stommelen / Paul | Porsche 935 JLP-3 | JLP Racing | 719 | 4443.3340 kms | 184.7430 | | 1st | GTP |
| 2nd | 5 | Akin / Siebert / Bell | Porsche 935 K3/80 | Bob Akin Motor Racing | 708 | | | | 2nd | GTP |
| 3rd | 46 | DeNarvaez / Garretson / Wood | Porsche 935 K3 | Garretson Ent. | 683 | | | | 3rd | GTP |
| 4th | 77 | Katayama / Yorino / Terada | Mazda RX-7 | Mazda of North America | 644 | | | | 1st | GTO |
| 5th | 05 | Soto / Rodriguez / Almeida | Porsche Carrera RSR | T & R Racing | 642 | | | | 2nd | GTO |
| 6th | 98 | Rude / Mueller / Moffat | Mazda RX-7 | Kent Racing | 640 | | | | 1st | GTU |
| 7th | 92 | Mullen / Bohren / Grable | Mazda RX-7 | Kent Racing | 632 | | | | 2nd | GTU |
| 8th | 26 | Nehl / Riggins / Silcox | Chevrolet Camaro | Auriga Racing | 626 | | | | 4th | GTP |
| 9th | 24 | Refenning / Tilton / Bond | Porsche 934 | 901 Shop | 618 | | | | 3rd | GTO |
| 10th | 38 | Mandeville / Johnson / Kline | Mazda RX-7 | Mandeville Racing Ent. | 615 | | | | 3rd | GTU |
| 11th | 36 | Miller / Bedard / Barth | Porsche 924 Carrera | Herman + Miller P+A | 608 | | | | 4th | GTO |
| 12th | 37 | Neland / Kuhel / Northam | Chevrolet Camaro | Kend Co. Ent. | 602 | | | | 5th | GTO |
| 13th | 86 | Haywood / Leven / Holbert | Porsche 935/80 | Bayside Disposal Racing | 598 | | | | 5th | GTP |
| 14th | 63 | Waugh / Downing / Maffucci | Mazda RX-7 | Downing/Atlanta | 590 | | | | 4th | GTU |
| 15th | 57 | Carmean / O'Steen / Pimm | Mazda RX-7 | Red Roof Inn | 584 | | | | 5th | GTU |
| 16th | 35 | Speer / Ratcliff / Wolters | Porsche Carrera RSR | W-S Ent. | 583 | | | | 6th | GTO |
| 17th | 01 | Morton / Klausler | Ford Mustang | Marketing Corp. of America | 569 | | | | 7th | GTO |
| 18th | 66 | Dunham / Smith, Jr. / Smith | Mazda RX-7 | Dunham Trucking | 662 | | | DNF | 6th | GTU |
| 19th | 58 | Bundy / Busby / Schurti | Porsche 924 Carrera | Brumos Racing | 558 | | | | 8th | GTO |
| 20th | 88 | Beasley / Stone / Lewis | Porsche Carrera RSR | Bob Beasley | 558 | | | | 9th | GTO |
| 21st | 444 | Tullius / Adam / Smiley | Jaguar XJS | Group 44 | 533 | | | | 6th | GTP |
| 22nd | 72 | Kjoller / Nikel / Clay | Porsche Carrera RSR | Carrera Motorsports | 529 | | | | 10th | GTO |
| 23rd | 6 | Wollek / Dören / Lanier | Ferrari 512 BB/LM | N.A.R.T. | 523 | | | DNF | 7th | GTP |
| 24th | 9 | Rahal / Canepa / Trueman | March 82G Chevrolet | Garretson Ent. | 514 | | | Gearbox | 8th | GTP |
| 25th | 78 | Flanders / Bitterauf / Smith | Porsche 911 | Der Klaus Haus | 511 | | | | 7th | GTU |
| 26th | 54 | Garcia / Naon / McFarlin | BMW M1 | Montura Racing | 475 | | | DNF | 11th | GTO |
| 27th | 50 | Febles / Ferrer / Soldevilla | Porsche Carrera RSR | Diego Febles Racing | 464 | | | | 12th | GTO |
| 28th | 80 | Mears / Emanuelson / Adams | Pontiac Firebird | Herb Adams | 435 | | | | 13th | GTO |
| 29th | 84 | "Jamsal" / Barrientos / Galdamez | Porsche 934 | Scorpio Racing | 420 | | | Differential | 14th | GTO |
| 30th | 4 | Raub / Leitzinger / Pasmas | Pontiac Firebird | Oftedahl Racing | 420 | | | | 15th | GTO |
| 31st | 3 | Sullivan / Belcher / Phipps | Rondeau M382 Cosworth | Belcher Racing | 408 | | | DNF | 9th | GTP |
| 32nd | 65 | Knoop / Baird / Pumpelly | Ferrari 512 BB/LM | Prancing Horse Farm Racing | 377 | | | Gearbox | 10th | GTP |
| 33rd | 51 | Juckette / Meldeau / McDill | Chevrolet Camaro | Meldeau Tire World | 351 | | | | 11th | GTP |
| 34th | 62 | Koll / Hoerr / McKitterick | Rondeau M382 Cosworth | Golden Eagle Racing | 338 | | | Fuel system | 12th | GTP |
| 35th | 30 | Long / Case / Case | Porsche 911 | Case Racing | 332 | | | | 8th | GTU |
| 36th | 02 | Bauer / Pratt / Minter | Ford Mustang | Marketing Corp. of America | 321 | | | Engine | 16th | GTO |
| 37th | 20 | Hunter / Turner / Eitel | Mercury Capri | AutoWest | 304 | | | | 17th | GTO |
| 38th | 44 | Hagan / Labonte / Felton | Chevrolet Camaro III | Stratagraph | 295 | | | Engine | 13th | GTP |
| 39th | 29 | Heinz / Kirill / Overbagh | Chevrolet Monza | Oberdorfer Research | 276 | | | | 18th | GTO |
| 40th | 21 | Crevier / Stiff / Wilson | BMW M1 | Crevier & Associates | 367 | | | DNF | 19th | GTO |
| 41st | 42 | Wonzer / Bean / Grantham | Porsche 911 | Gary Wonzer | 361 | | | | 9th | GTU |
| 42nd | 23 | Davenport / Carney / McComb | Datsun 280ZX | Raytown Datsun/D. Preston | 247 | | | Gearbox | 10th | GTU |
| 43rd | 34 | Drolsom / Johnson / Frank | Porsche 924 Carrera | Drolsom Racing | 238 | | | | 20th | GTO |
| 44th | 10 | Shafer / Mooney / Brassfield | Chevrolet Camaro II | Oftedahl Racing | 231 | | | DNF | 14th | GTP |
| 45th | 09 | Henn / Wilson / Hinze | Porsche 935 K3 | Thunderbird Swap Shop | 229 | | | DNF | 15th | GTP |
| 46th | 49 | Jolly / Copeman / Marx | Porsche Carrera RSR | Copeman Racing | 220 | | | DNF | 21st | GTO |
| 47th | 83 | Zitza / Belperche / Zitza | Porsche 914/6 | Zotz Garage | 213 | | | Oil leak | 11th | GTU |
| 48th | 13 | Arutunoff / Marina | Lancia Stratos | Hallet Motor Racing Circuit | 209 | | | Engine | 12th | GTU |
| 49th | 27 | Fowells / Mummery / Carusso | Mazda RX-7 | Scuderia Rosso | 168 | | | Electrics | 13th | GTU |
| 50th | 43 | Young / Gregg / McIntyre | Porsche Carrera RSR | Bob Gregg Racing | 161 | | | DNF | 22nd | GTO |
| 51st | 7 | Kent-Cooke / Wietzes / Adams | Lola T600 Chevrolet | Cooke Racing | 138 | | | DNF | 16th | GTP |
| 52nd | 67 | Delano / Petery / Nightingale | AMC Spirit AMX | Levi's Team Highball | 137 | | | DNF | 23rd | GTO |
| 53rd | 70 | Chmura / Schofield / Regan | Chevron GTP Mazda | Genesis Racing | 119 | | | | 17th | GTP |
| 54th | 08 | Howes / Nacthwey / Jones | Porsche 911 | Portia Parlor | 103 | | | Engine | 14th | GTU |
| 55th | 75 | Kreider / Swope / Knab | Chevrolet Corvette C3 | Performance Plus Products | 101 | | | DNF | 24th | GTO |
| 56th | 07 | Heimrath, Jr. / Heimrath | Porsche 924 Carrera | Heimrath Racing | 91 | | | Engine | 25th | GTO |
| 57th | 60 | Church / Marx | AMC AMX | Bob's Speed Products | 91 | | | DNF | 26th | GTO |
| 58th | 15 | Panaccione / Mead / Graham | Porsche 911 Carrera RSR | D. L. Performance | 71 | | | DNF | 27th | GTO |
| 59th | 73 | Howey / Koch / Wolf | Chevrolet Camaro | Wolf Engine | 70 | | | DNF | 28th | GTO |
| 60th | 25 | Cowart / Miller | March 82G BMW | Red Lobster Racing | 68 | | | Engine | 18th | GTP |
| 61st | 2 | Fitzpatrick | Porsche 935 K3/80 | John Fitzpatrick Racing | 59 | | | DNF | 19th | GTP |
| 62nd | 0 | Field | Porsche 935 K3/80 | Interscope Racing | 55 | | | Engine | 20th | GTP |
| 63rd | 89 | English / Thompson | Chevrolet Camaro | Herb Adams | 42 | | | DNF | 29th | GTO |
| 64th | 87 | Ramirez / Cook / Cooper | Mazda RX-7 | R. Sanchez Racing | 26 | | | DNF | 15th | GTU |
| 65th | 79 | Bergstrom | Porsche 924 Carrera GTR | Promo. Ltd./Whitehall Cap. | 12 | | | Suspension | 30th | GTO |
| 66th | 41 | Schmidt / Schmidt / Hitt | Chevrolet Corvette C3 | Starved Rock Ledge | 9 | | | DNF | 31st | GTO |
| 67th | 52 | Swanson | Porsche 911 | Ours & Hours Racing | 2 | | | Engine | 16th | GTU |
| 68th | 11 | Aase | BMW M1 | Kendall Racing | 1 | | | Engine | 32nd | GTO |
| 69th | 47 | de Dryver | Ferrari 512 BB/LM | Tide Racing | 1 | | | DNF | 21st | GTP |