| 1st | 86 | Mass / Rahal | Porsche 962 | Bayside Disposal Racing | 298 | 1971.0920 kms | 163.9262 | | 1st | GTP |
| 2nd | 14 | Robinson / Holbert | Porsche 962 | Holbert Racing | 296 | | | | 2nd | GTP |
| 3rd | 8 | Redman / Kneifel / Forbes-Robinson | Porsche 962 | Primus Motorsport | 293 | | | | 3rd | GTP |
| 4th | 0 | van der Merwe / "Winter" / Ongais | Porsche 962 | Joest Racing | 281 | | | | 4th | GTP |
| 5th | 28 | Pickett / Riggins | Chevrolet Camaro | Protofab Racing | 281 | | | | 1st | GTO |
| 6th | 5 | Weaver / Akin / Shelton | Porsche 962 | Bob Akin Motor Racing | 280 | | | | 5th | GTP |
| 7th | 67 | Wollek / Brassfield / Dallenbach, Jr. | Porsche 962 | Busby Racing | 275 | | | | 6th | GTP |
| 8th | 22 | Jenner / Akin | Ford Mustang | Roush Racing | 274 | | | | 2nd | GTO |
| 9th | 98 | Cord / Fangio II | Toyota Celica Turbo | All-American Racers | 267 | | | | 3rd | GTO |
| 10th | 42 | Higgins / Monk / Cherry | Fabcar CL Porsche | MMG/White Allen | 265 | | | | 1st | Lights |
| 11th | 05 | Morgan / Rothbarth | Royale RP40 Mazda | RM Racing | 261 | | | | 2nd | Lights |
| 12th | 09 | Durst / Brockman / Belcher | Spice SE86CL Pontiac Fiero GTP | Ball Bros. Racing | 261 | | | | 3rd | Lights |
| 13th | 65 | Clinton / Clement / Barrett | Ford Mustang | Grey Eagle Racing | 256 | | | | 4th | GTO |
| 14th | 63 | Downing / Maffucci / O'Steen | Argo JM19 Mazda | Jim Downing | 253 | | | | 4th | Lights |
| 15th | 19 | Schubot / Ludemann / Jones | Tiga GT285 Mazda | S & L Racing | 252 | | | Fuel | 5th | Lights |
| 16th | 74 | Gentilozzi / Hoerr / Winters | Oldsmobile Toronado | Whitehall Rocketsports | 251 | | | | 5th | GTO |
| 17th | 17 | Bacon / Reed | Mazda RX-7 | Al Bacon Racing | 245 | | | | 1st | GTU |
| 18th | 54 | Auberlen / Auberlen / Durkheimer | Porsche 911 | SP Racing | 244 | | | | 2nd | GTU |
| 19th | 76 | Baldwin / Wietzes | Chevrolet Camaro | Peerless/Hendrick | 243 | | | Engine | 6th | GTO |
| 20th | 89 | Uria / Figaro / Rathbun / Refenning | Porsche 911 Carrera RSR | 901 Racing | 243 | | | | 3rd | GTU |
| 21st | 87 | Morrison / Hayner / Knowles / McConnell | Chevrolet Corvette | Morrison-Cook Motorsport | 241 | | | | 7th | GTO |
| 22nd | 30 | McCall / Bohren / Dallenbach | Chevrolet Camaro III | Skoal Bandit Racing | 241 | | | | 8th | GTO |
| 23rd | 43 | McAdam / Overbey / Mead | Fabcar CL Porsche | MMG/White Allen | 238 | | | | 6th | Lights |
| 24th | 75 | Kendall / Kendall / Jones | Mazda RX-7 | Clayton Cunningham Racing | 236 | | | | 4th | GTU |
| 25th | 35 | Gonzalez / Villa / Gordillo | Royale RP40 Porsche | Diman Racing | 235 | | | | 7th | Lights |
| 26th | 61 | O'Neill / Lloyd | Argo JM19 Buick | Performance Technology | 230 | | | | 8th | Lights |
| 27th | 84 | Church / Hunt / Generotti | Mazda RX-7 | Guy Church | 226 | | | | 5th | GTU |
| 28th | 82 | Greer / Mees / Finger | Mazda RX-7 | Dick Greer Racing | 225 | | | | 6th | GTU |
| 29th | 46 | Morejon / Galeano | Porsche 911 | Turbo Concepts | 224 | | | | 7th | GTU |
| 30th | 71 | Johnson / Shaw | Mazda RX-7 | Team Highball | 217 | | | | 8th | GTU |
| 31st | 11 | St. James / Gloy | Ford Mustang | Roush Racing | 213 | | | | 9th | GTO |
| 32nd | 85 | Boyer / Roberts | Pontiac Firebird | Highlands Racing | 211 | | | | 10th | GTO |
| 33rd | 00 | Slater / Duttinger / Bartling | Porsche 911 Carrera RSR | S Squared Engineering | 209 | | | | 9th | GTU |
| 34th | 81 | Bupp / Church / Taylor | Chevrolet Camaro | Sentry Bank Equipment | 205 | | | Gearbox | 11th | GTO |
| 35th | 23 | Petrilak / Rosenberg / MacInnes | Argo JM19? Buick | Motion Promotions | 201 | | | | 9th | Lights |
| 36th | 68 | Chambers / Wallace | Mazda RX-7 | Chambers Racing | 201 | | | | 10th | GTU |
| 37th | 08 | Romano / Swifts / Drew | Mazda RX-7 | Simms Romano Enterprise | 188 | | | | 11th | GTU |
| 38th | 52 | Case / Dewey / Cason / Northam | Lola T616 Mazda | Wonzer Racing | 186 | | | | 10th | Lights |
| 39th | 4 | Pruett / Halsmer | Ford Mustang GTX Special | Roush Racing | 179 | | | | 7th | GTP |
| 40th | 80 | Finotto / Melgrati / Silva | Alba AR6 Ferrari | Gaston Andrey Racing | 177 | | | Gearbox | 11th | Lights |
| 41st | 24 | Rubright / Jenkins / Newsome | Chevrolet Corvette | C A R Enterprises | 165 | | | | 12th | GTO |
| 42nd | 90 | Lee / Myers / Lee | Buick Skyhawk | Bob's Speed Products | 161 | | | DNF | 13th | GTO |
| 43rd | 50 | Brosnaham / Cross / Johnson | Chevrolet Camaro | Henry A Brosnaham | 158 | | | | 14th | GTO |
| 44th | 25 | Loring / Andrey / Lewis | Tiga GT286 Ferrari | Gaston Andrey Racing | 145 | | | Engine | 12th | Lights |
| 45th | 44 | Goral / Bond / Figaro | Porsche 911 | Goral Racing | 140 | | | Engine | 12th | GTU |
| 46th | 49 | Munoz / Catter / Gonzalez | Pontiac Firebird | Catters Racing Team | 136 | | | DNF | 15th | GTO |
| 47th | 16 | Cobb / Schuppan | Porsche 962 | Dyson Racing | 123 | | | Accident | 8th | GTP |
| 48th | 60 | DePoyster / Schader / Kurz / Jocelyn | Mazda RX-7 | Schaderacing | 114 | | | Gearbox | 13th | GTU |
| 49th | 31 | Hobbs / Robinson / Hobbs | Gebhardt JC853 BMW | Gebhardt Racing USA | 110 | | | DNF | 13th | Lights |
| 50th | 96 | Dibos / Rinzler | Tiga GT286 Mazda | Hessert Racing | 93 | | | DNF | 14th | Lights |
| 51st | 47 | Mills / Oakley | Mazda RX-7 | Cumberland Valley Racing | 90 | | | Clutch | 14th | GTU |
| 52nd | 56 | Wink / Martin / Erickson / Evans | Chevrolet Camaro | Bill Wink Racing | 87 | | | Engine | 16th | GTO |
| 53rd | 79 | McKitterick / Boady / Lewis | Alba AR5 Oldsmobile | Whitehall Rocketsports | 86 | | | DNF | 15th | Lights |
| 54th | 99 | Ribbs / Rice | Toyota Celica Turbo | All-American Racers | 84 | | | Overheating | 17th | GTO |
| 55th | 40 | Bieri / Pallavicini | Alba AR2 Ferrari | Bieri Racing | 76 | | | Engine | 16th | Lights |
| 56th | 83 | Shafer / Maloy / Shafer | Chevrolet Camaro | Shafer Racing | 76 | | | Accident | 18th | GTO |
| 57th | 51 | Heinz / Young | Chevrolet Corvette | Quality Motorsports | 75 | | | DNF | 19th | GTO |
| 58th | 1 | Foyt / Sullivan / Haywood | Porsche 962 | A J Foyt Enterprises | 73 | | | Accident | 9th | GTP |
| 59th | 13 | Altman / Altman / Selby | Porsche 914/6 | Altman Bros Motor Racing | 68 | | | Gearbox | 15th | GTU |
| 60th | 9 | Tomlinson / Loebel / Morgan | Tiga GT285 Mazda | Finco Racing | 57 | | | Engine | 17th | Lights |
| 61st | 38 | Mandeville / Marsh | Mazda RX-7 | Mandeville Auto Tech | 56 | | | Engine | 20th | GTO |
| 62nd | 36 | Jellinek / Grooms | Royale RP40 Mazda | Erie Scientific Racing | 54 | | | Engine | 18th | Lights |
| 63rd | 26 | Taylor / Montgomery | Pontiac Firebird | Bob's Speed Products | 45 | | | DNF | 21st | GTO |
| 64th | 91 | Gaylord / Albiza | Oldsmobile Calais | Lucas Truck Service | 38 | | | Engine | 22nd | GTO |
| 65th | 12 | Shafer / Nehl / Peters | Buick Somerset | Centurion AutoTransport | 36 | | | Differential | 23rd | GTO |
| 66th | 01 | Kline / Bell | Spice Pontiac Fiero GTP | Spice Engineering | 31 | | | Overheating | 19th | Lights |
| 67th | 77 | Lappalainen | Chevrolet Camaro | Brooks Racing | 25 | | | Differential | 24th | GTO |
| 68th | 72 | Loving / Small | Chevrolet Camaro | Sunrise Racing | 23 | | | DNF | 25th | GTO |
| 69th | 15 | Murray / Visger | Pontiac Fiero | Murray Racing | 20 | | | Engine | 16th | GTU |
| 70th | 70 | Juckette / McDill | Chevrolet Camaro | Hi-Tech Coating | 19 | | | Clutch | 26th | GTO |
| 71st | 21 | Felton | Chevrolet Camaro | OMR Engines | 10 | | | Engine | 27th | GTO |
| 72nd | 88 | Heinricy | Chevrolet Corvette | Morrison-Cook Motorsport | 9 | | | Engine | 28th | GTO |
| 73rd | 29 | Phillips | Tiga GT286 Buick | Ares Sports | 8 | | | Electrics | 20th | Lights |
| 74th | 04 | Pilla | Porsche 944 | Dave White Racing | 7 | | | Engine | 29th | GTO |