| 1st | 6 | Fitzpatrick / Barbour | Porsche 935 K3 | Dick Barbour Racing | 253 | 2117.2529 kms | 176.2554 | | 1st | GTX |
| 2nd | 0 | Field / Ongais | Porsche 935 K3/80 | Interscope Racing | 250 | | | | 2nd | GTX |
| 3rd | 93 | Whittington / Whittington / Whittington | Porsche 935 K3 | Whittington Bros. | 247 | | | | 3rd | GTX |
| 4th | 09 | Paul / Henn / Holbert | Porsche 935 K3 | Thunderbird Swap Shop | 239 | | | | 4th | GTX |
| 5th | 05 | Akin / Woods / McKitterick | Porsche 935 K3 | Mendez/Woods/Akin | 232 | | | | 5th | GTX |
| 6th | 44 | Tullius / Adam | Triumph TR8 | Group 44 | 230 | | | | 1st | GTO |
| 7th | 9 | Garretson / Rahal / Nierop | Porsche 935 K3 | Dick Barbour Racing | 227 | | | | 6th | GTX |
| 8th | 07 | Heimrath / Rutherford / Moran | Porsche 935 | Ludwig Heimrath | 224 | | | | 7th | GTX |
| 9th | 77 | Mandeville / Downing / Frisselle | Mazda RX-7 | Mandeville Racing | 222 | | | | 1st | GTU |
| 10th | 86 | Gregg / Haywood / Leven | Porsche 935/77A | Bayside Disposal Racing | 220 | | | | 8th | GTX |
| 11th | 68 | Mendez / Rodriguez / Soto | Porsche 911 Carrera RSR | Porsche Montecarlo | 216 | | | DNF | 2nd | GTO |
| 12th | 03 | Frank / Brolin | Porsche 934 | Toyota Village | 213 | | | | 3rd | GTO |
| 13th | 92 | Schramm / Bartling | Porsche Carrera RSR | Framm Promotions | 213 | | | | 4th | GTO |
| 14th | 95 | Ramirez / Villa / Gordillo | Porsche 911 | Mike Ramirez | 212 | | | | 2nd | GTU |
| 15th | 96 | Posey / Alderman / Stiff | Datsun 240Z | NTS Racing | 211 | | | | 3rd | GTU |
| 16th | 37 | Espinosa / Cortes | Porsche Carrera RSR | Botero Racing | 211 | | | | 5th | GTO |
| 17th | 81 | Welch / Winters / Cook | Mazda RX-7 | Trinity Racing | 210 | | | | 4th | GTU |
| 18th | 34 | Drolsom / Johnson / Hoskins | Porsche 911 | Drolsom Racing | 206 | | | | 5th | GTU |
| 19th | 56 | Borlase / Kravig / Hammond | Porsche 911 | Rick Borlase | 205 | | | | 6th | GTO |
| 20th | 22 | Hirsch / Brezinka / Aschenbrenner | Porsche 914/6 | R & H Racing | 205 | | | | 6th | GTU |
| 21st | 98 | Van Every / Tisdelle | Porsche Carrera RSR | Van Every Racing | 194 | | | | 7th | GTO |
| 22nd | 90 | Lee / Kump / Leo | AMC AMX | Bob's Speed Products | 191 | | | | 8th | GTO |
| 23rd | 54 | Garcia / Naon / Herman | Porsche Carrera RSR | Montura Racing | 187 | | | Engine | 9th | GTO |
| 24th | 87 | Bitterauf / Moxley / Smith | Porsche 911 | Der Klaus Haus | 185 | | | | 7th | GTU |
| 25th | 31 | Lopez / Arzeno | Porsche 911 | Lopez Bros. | 179 | | | | 8th | GTU |
| 26th | 46 | DeNarvaez / Londono | Porsche 911 Carrera RSR | de Narvaez Enterprises | 177 | | | DNF | 10th | GTO |
| 27th | 30 | Moretti / Pianta / Zorzi | Porsche 935J | Electrodyne | 176 | | | Engine | 9th | GTX |
| 28th | 24 | DiLella / Cueto | Porsche 914/6 | DiLella Racing | 172 | | | DNF | 9th | GTU |
| 29th | 60 | Ferran / Bond / Refenning | Porsche Carrera RSR | Bill Ferran | 172 | | | | 11th | GTO |
| 30th | 25 | Cowart / Miller / Bell | BMW M1 | Red Lobster Racing | 172 | | | | 10th | GTX |
| 31st | 80 | Carter / Carter / Edwards | Chevrolet Camaro | All Canadian/Peerless | 167 | | | Engine | 11th | GTX |
| 32nd | 49 | Henderson / Copeman / Humphreys | Porsche Carrera | Tortilla Flats Racing | 166 | | | | 12th | GTO |
| 33rd | 57 | Baker / Scott / Gilliland | Porsche 914/4 | Personalized Porsche | 163 | | | | 10th | GTU |
| 34th | 78 | Nesbitt / Johnson | Mazda RX-2 | Revolution Wheels | 162 | | | | 11th | GTU |
| 35th | 08 | Ratcliff / Speer / Wolters | Porsche 911 | Moran Construction | 161 | | | DNF | 12th | GTU |
| 36th | 99 | Boy / Hunt | Chevrolet Corvette | National Jets | 160 | | | | 13th | GTO |
| 37th | 51 | Kirby / Baker / Sherwin | Porsche Carrera RSR | Kirby-Hitchcock Racing | 153 | | | DNF | 14th | GTO |
| 38th | 79 | Bergstrom / Bedard | Mazda RX-7 | Sports Ltd. Racing | 148 | | | | 13th | GTU |
| 39th | 88 | Adams / Thompson | Pontiac Fire-Am | Herb Adams V.S.E. | 146 | | | DNF | 15th | GTO |
| 40th | 84 | Boand / Kivela / Irwin | Chevrolet Corvette | Bard Boand Racing | 140 | | | | 16th | GTO |
| 41st | 27 | LaGrow / Boyer / Turner | Chevrolet Camaro | Holley & LaGrow | 138 | | | | 12th | GTX |
| 42nd | 58 | Gonzalez / Febles / Soldevilla | Porsche 934 | Coco Lopez/Pina Colada | 135 | | | | 17th | GTO |
| 43rd | 82 | Casey / Dietrich / Mueller | Mazda RX-7 | Trinity Racing | 123 | | | Axle | 14th | GTU |
| 44th | 73 | Honegger / Hutchins / Bohren | Mazda RX-7 | Z & W Enterprises | 118 | | | DNF | 15th | GTU |
| 45th | 06 | Mullen / Fassler / Siebert | Porsche Carrera RSR | Fassler-Mullen Racing | 108 | | | DNF | 18th | GTO |
| 46th | 40 | Cotrone / Donaldson / Currin | Chevrolet Corvette | Joe Cotrone | 106 | | | | 19th | GTO |
| 47th | 21 | Young / Lazier | Chevrolet Camaro | Oftedahl Trucking | 101 | | | DNF | 20th | GTO |
| 48th | 3 | Busby / Jenner / Knoop | March-BMW M1 | Jim Busby Industries | 100 | | | Gearbox | 13th | GTX |
| 49th | 55 | Kent-Cooke / St. James | Porsche 935 | Condor Racing | 87 | | | Engine | 14th | GTX |
| 50th | 70 | Doyle / Guest / Meyer | Mazda RX-7 | Chris Doyle | 87 | | | DNF | 16th | GTU |
| 51st | 7 | Statzer / Johnson / Shaw | AMC Spirit AMX | Caribbean AMC/Jeep | 84 | | | Engine | 15th | GTX |
| 52nd | 32 | "Jamsal" / Pineda | Porsche Carrera RSR | Scorpio Racing | 80 | | | Transmission | 21st | GTO |
| 53rd | 10 | Heinz / Nagel | Chevrolet Camaro II | Oftedahl Trucking | 74 | | | Engine | 22nd | GTO |
| 54th | 38 | Fernandez / Ferrer / Lange | Porsche Carrera RSR | Boricua Racing | 73 | | | DNF | 23rd | GTO |
| 55th | 23 | Zulkowski / Brisken / Nylander | Porsche 914/6 | Metalcraft Racing | 73 | | | DNF | 17th | GTU |
| 56th | 71 | Jennings / Bean / Ashby | Porsche 911 | Bruce Jennings | 69 | | | DNF | 18th | GTU |
| 57th | 83 | Deacon / Moennick | Porsche Carrera | David Deacon | 63 | | | Engine | 24th | GTO |
| 58th | 15 | Gebhardt / Beilcke | BMW CSL | Bavarian Motors International | 63 | | | DNF | 25th | GTO |
| 59th | 14 | Garcia / Shinn / Vilarchao | Chevrolet Corvette | George Garcia | 63 | | | DNF | 26th | GTO |
| 60th | 4 | Marcus / Harmon / Hinze | Porsche 935 | Dick Barbour Racing | 52 | | | Accident | 16th | GTX |
| 61st | 13 | Townsend / Morton | Porsche 935 | Andial Racing | 52 | | | DNF | 17th | GTX |
| 62nd | 35 | Taylor / Taylor / Cavenaugh | Alfa Romeo Alfetta | Janis Taylor | 51 | | | DNF | 19th | GTU |
| 63rd | 50 | Shulnburg / Keyser / Morgan | Chevrolet Corvette | Shulnburg Scrap Metal | 49 | | | Engine | 18th | GTX |
| 64th | 5 | Mendez / Redman / Miller | Porsche 935 K3 | Mendez/Woods/Akin | 49 | | | Engine | 19th | GTX |
| 65th | 41 | Jones, Jr. / Faul / Combs | Buick Skylark | Jones Industries Racing | 43 | | | Engine | 27th | GTO |
| 66th | 66 | Shafer / Shafer / Crookston | Datsun 240Z | George R. Shafer | 37 | | | DNF | 20th | GTU |
| 67th | 89 | Soto / Rodriguez | Porsche Carrera RSR | Hector Huerta Racing | 35 | | | DNF | 28th | GTO |
| 68th | 02 | Almeida / Rodriguez / Riano | Chevrolet Corvette | T & R Racing | 33 | | | Engine | 20th | GTX |
| 69th | 65 | Noseda | Chevrolet Camaro | Jeffrey Loving | 28 | | | DNF | 29th | GTO |
| 70th | 48 | John Carusso | Chevrolet Corvette | Dynasales | 28 | | | Withdrawn | 30th | GTO |
| 71st | 12 | Smith / Jernigan | Chevrolet Camaro | Performance Marine | 28 | | | Engine | 31st | GTO |
| 72nd | 8 | Arutunoff | Lancia Stratos | A. I. Honda | 23 | | | DNF | 21st | GTU |
| 73rd | 85 | Hulen / Coupland | Porsche 914/6 | John E. Hulen | 20 | | | Electrics | 22nd | GTU |
| 74th | 17 | Chitwood | Chevrolet Nova | Tim Chitwood | 19 | | | Engine | 32nd | GTO |
| 75th | 28 | Overby | Porsche 911 | Hamilton House Racing | 12 | | | DNF | 33rd | GTO |
| 76th | 74 | Ramirez | Mazda RX-7 | Z & W Enterprises | 8 | | | DNF | 23rd | GTU |
| 77th | 61 | Muzzin | Chevrolet Corvette | Tim Morgan | 5 | | | Engine | 34th | GTO |
| 78th | 62 | Tachi | Dome Toyota Celica Turbo | Tom's/Dome/Kegel Enterprises | 4 | | | Engine | 21st | GTX |
| 79th | 36 | Panaccione | Porsche 911 | Case Racing | 4 | | | DNF | 24th | GTU |