| 1st | 6 | Stommelen / Barbour / Mears | Porsche 935/77A | Dick Barbour Racing | 2:38.0380 | 190.6316 |
| 2nd | 09 | Haywood / Henn / Gregg | Porsche 935/77A | Thunderbird Swap-Shop | 2:39.9120 | |
| 3rd | 18 | Paul / Holbert | Porsche 935 JLP-1 | JLP Racing | 2:40.1900 | |
| 4th | 5 | Mendez / Redman / Miller | Porsche 935 | Busch Beer Racing | 2:44.4350 | |
| 5th | 00 | Field / Ongais | Porsche 935/77A | Interscope Racing | 2:45.9290 | |
| 6th | 94 | Whittington / Whittington | Porsche 935/79 | Whittington Bros. Racing | 2:46.2360 | |
| 10th | 97 | Londono / Garces / Gunn | Porsche 935 | Ricardo Londono | 2:48.0170 | |
| 7th | 3 | Garretson / Belcher / Bondurant | Porsche 935 | Dick Barbour Racing | 2:50.1790 | |
| 8th | 7 | Heimrath / *"Jamsal" / *Moran | Porsche 935 | Heimrath Racing | 2:50.5090 | |
| 9th | 9 | Akin / McFarlin / Woods | Porsche 935 | Dick Barbour Racing | 2:51.3880 | |
| 11th | 28 | Kearns / Moretti | Porsche 935 | Desperado Racing | 2:51.7990 | |
| 0 | Ongais / Field | Porsche 935/79 | Interscope Racing | 2:55.3600 | |
| 12th | 46 | DeNarvaez / Naon | Porsche 911 Carrera RSR | Mauricio deNarvaez | 2:55.9420 | 171.2326 |
| 13th | 92 | Whittington / Whittington / Minter | Porsche 934 | Whittington Bros. Racing | 2:56.3620 | |
| 14th | 13 | Shaw, Jr. / Ridgely | Porsche 935 | Hal Shaw Racing | 2:57.3420 | |
| 15th | 89 | Romero / Soto | Porsche 911 Carrera RSR | Hector Huerta | 2:58.3440 | |
| 16th | 38 | Fernandez / Ferrer / Soldevilla | Porsche Carrera RSR | Boricua Racing | 2:59.3060 | |
| 17th | 56 | Carter / Edwards / Valentine | Chevrolet Camaro | Peerless Racing | 2:59.3690 | |
| 18th | 41 | Jones, Jr. / Hollis | Chevrolet Camaro | Jones Ind. Racing | 2:59.4350 | |
| 19th | 91 | Schramm / Frank | Porsche Carrera RSR | Framm Promotions | 2:59.8360 | |
| 20th | 62 | Koll / Cook / Aase | Porsche 914/6 | Koll Motor Sports | 3:00.2830 | 167.1095 |
| 21st | 54 | Garcia / Montalvo / Vadia | Porsche Carrera RSR | Montura Ranch Estates | 3:00.3930 | |
| 22nd | 07 | Cowart / Miller / McClain | Porsche Carrera RSR | Morrison's | 3:00.9630 | |
| 23rd | 58 | Febles / Currin | Porsche 911 Carrera RSR | Diego Febles Racing | 3:01.7810 | |
| 24th | 37 | Espinosa / Lopez / Cortes | Porsche Carrera RSR | Botero Racing Team | 3:01.8470 | |
| 25th | 43 | McDill / Frank | Chevrolet Camaro | Meldeau Tire Stores | 3:01.9370 | |
| 26th | 21 | Shafer / *Wood | Chevrolet Camaro | Oftedahl/Shafer Farms | 3:02.0590 | |
| 27th | 15 | Gebhardt / *Beilcke | BMW CSL | Bavarian Motors | 3:02.0800 | |
| 28th | 98 | Van Every / Tisdelle | Porsche Carrera RSR | Van Every Racing | 3:02.2830 | |
| 29th | 69 | Kroll / Bartling | Porsche Carrera RSR | Bytzek Automotive | 3:02.6340 | |
| 30th | 23 | Kemp / Nierop / Baird | Ford Cobra II | Kemp Motoracing | 3:03.5900 | |
| 31st | 01 | White / Overby | Porsche 911 | Roehrig Racing | 3:04.5520 | |
| 32nd | 16 | Overstreet / Mitchell | Porsche 914/6 | Overstreet Racing Ent. | 3:05.4870 | |
| 33rd | 47 | Chitwood / Chitwood | Chevrolet Nova | Tim Chitwood | 3:06.2330 | |
| 34th | 39 | Trueman / Higgins / Mead | Porsche 911 | Barrick Motor Racing | 3:06.2930 | |
| 35th | 2 | Henn / St. James / Guthrie | Ferrari 365 GTB/4 | Thunderbird Swap-Shop | 3:06.8240 | |
| 36th | 79 | Bergstrom / Frisselle | Mazda RX-7 | Sports Ltd. Racing | 3:06.8450 | |
| 78 | Gonzalez / Matienzo | Chevrolet Camaro | Iggy Gonzalez | 3:06.8450 | |
| 37th | 72 | Scott / Honegger | Porsche 911 | Bill Scott Racing-Z&W | 3:07.2970 | |
| 38th | 70 | Bohren / Besmer | Mazda RX-7 | Walt Bohren Racing | 3:08.6100 | |
| 39th | 85 | Hulen / Coupland / Speakman | Porsche 914/6 | John E. Hulen | 3:08.8800 | |
| 40th | 31 | Cruz / Lopez / Gonzalez | Porsche 911 | Hiram Cruz | 3:09.0390 | |
| 41st | 77 | Mandeville / Johnson / Downing | Mazda RX-7 | Roger T. Mandeville | 3:09.4050 | |
| 42nd | 66 | Loving / Small / Noseda | Chevrolet Camaro | Sunset Racing | 3:09.7110 | |
| 43rd | 27 | Mummery / Sheehy / Sereix | Porsche 911 S | Miami Auto Racing | 3:09.9160 | |
| 44th | 60 | Bond / Tilton | Porsche 911 | E. J. Pruitt & Sons | 3:10.5380 | |
| 45th | 61 | Bean / *Cosentino / *Ashby | Mazda RX-3 | Bill Bean | 3:12.0930 | |
| 46th | 36 | Case / Panaccione | Porsche 911 | Case Racing | 3:13.1290 | |
| 47th | 25 | Zulkowski / Raney | Porsche 914/6 | Metal Craft Racing | 3:13.3680 | |
| 48th | 50 | Brezinka / Hirsch / Hochreuter | Porsche 911 | R & H Racing | 3:13.7080 | |
| 49th | 33 | Welter / Aten / Refenning | Porsche 911 | Peter Welter | 3:13.7810 | |
| 50th | 48 | Fillingham / *Canfield / *Chitwood | Chevrolet Corvette | Fillingham Racing | 3:13.9630 | |
| 51st | 53 | Thomas / Moise / Nehl | Chevrolet Camaro | Guy F. Thomas | 3:14.4050 | |
| 52nd | 44 | Van Arsdale / Murry | Porsche 911 | SUD Porsche Racing | 3:14.7880 | |
| 53rd | 03 | Almeida / Rodriguez / Romero | Chevrolet Corvette | Motorcito Racing | 3:14.9590 | |
| 54th | 40 | Southard / *Roe | Porsche 914/6 | Performance Specialists | 3:15.8480 | |
| 55th | 71 | Jennings / Beasley | Porsche 911 | Bruce Jennings | 3:16.1890 | |
| 56th | 17 | LaGrow / Boyer | Chevrolet Camaro | Kenneth D. LaGrow | 3:16.2910 | |
| 57th | 8 | Arutunoff / Marina / Sullivan | Lancia Stratos | Automobiles International | 3:16.7210 | |
| 58th | 08 | Wolters / Buchler / Northam | Porsche 911 | Moran Construction | 3:17.2690 | |
| 59th | 81 | Faul / Jones, Jr. / Lang | Chevrolet Corvette | Jones Ind. Racing | 3:17.4250 | |
| 60th | 93 | Deacon / Riley / Franczak | Porsche 914/6 | M. Rochas Porsche | 3:17.7160 | |
| 61st | 51 | Kirby / Baker / Winters | Porsche 914/4 | Personalized Porsche | 3:19.3750 | |
| 62nd | 57 | Tremblay / *Lapp | Datsun 240Z | J. F. Tremblay | 3:20.4480 | |
| 63rd | 52 | Swanson / Gauthier | Chevrolet Camaro | Ours & Hours Racing | 3:20.6480 | |
| 64th | 22 | Kirill / Wellik / Shafer | Chevrolet Camaro | Oftedahl Racing | 3:21.8800 | |
| 65th | 34 | Drolsom / Greb / Maffucci | Porsche 911 | Drolsom Racing | 3:22.2020 | |
| 69th | 87 | Williamson / Miller / Gano | Chevrolet Corvette | U-Mo Racing | 3:24.1050 | |
| 66th | 67 | Quintana / *Balaguer / *DeCardenas / *Vazquez | Porsche 911 | Quintana Racing | 3:24.2800 | |
| 67th | 88 | Yerger / Orlando / Taylor | Alfa Romeo GTV | Day Enterprise Racing | 3:25.5490 | |
| 68th | 14 | Garza / McVey / Cross | Porsche Carrera | Precision School of Racing | 3:25.5690 | |
| 75th | 04 | Thompkins / Heinz | Chevrolet Corvette | Rick Thompkins | 3:32.0340 | |
| 74 | Garcia / Cueto | Chevrolet Camaro | Raul Garcia | 3:38.0060 | |
| 76 | Williams / Doran | Datsun 240Z | Associated Speed & Performance | 3:38.5660 | |
| 90 | Lee / Kump | AMC AMX | Bob's Speed Products | 3:40.4620 | |
| 76th | 12 | Smith / Tumbleston / Potter | Chevrolet Camaro | Ford Smith Racing | 3:44.3630 | |
| 86 | Ross / Tavilla | Ford Pinto | Team Ross Racing | 3:53.9050 | |
| 06 | Wonzer / Van Arsdale | Triumph GT6 | Gary J. Wonzer | 4:05.4170 | |
| 68 | Cosentino / Bean / Ashby | Mazda RX-3 | Faza Squadra | 4:21.2680 | |
| 70th | 02 | Roehrig / Roehrig | Porsche 911 | Roehrig Racing | no time | |
| 71st | 29 | Hagan / Overbagh / Reed | Chevrolet Monza | Stratagraph | no time | |
| 72nd | 75 | Ramirez / Villa / Gordillo | Porsche 911 | Mike Ramirez | no time | |
| 73rd | 4 | Leuzinger / *Van der Werff | De Tomaso Pantera | B. R. Racing Team | no time | |
| 74th | 95 | Bond / Dann | Chevrolet Monza | Ozone Industries | no time | |