| 1st | 61 | Jim Busby / Peter Gregg | Porsche 934/5 | Brumos Racing | 2:47.0030 |
| 2nd | 0 | Danny Ongais / Ted Field / Hurley Haywood | Porsche 934/5 | Vasek Polak/Interscope Racing | 2:47.6190 |
| 3rd | 76 | John Greenwood / Burt Greenwood / Rick Mancuso | Chevrolet Corvette | Mancuso Chevrolet | 2:49.4830 |
| 4th | 09 | John Gunn / Gary Belcher | Porsche 934/5 | Belcher Racing | 2:50.0700 |
| 5th | 68 | Phil Currin / Rick Hay / Rob Hoskins | Chevrolet Corvette | Rick Hay | 2:54.5600 |
| 6th | 05 | Jim Trueman / Jerry Thompson / Don Yenko | Chevrolet Monza | Red Roof Inns, Inc. | 2:55.2950 |
| 7th | 30 | George Dyer / Brad Frisselle | Porsche 911 Carrera RSR 3.0 | George Dyer Racing | 2:55.4260 |
| 8th | 15 | Javier Garcia / Jack Baldwin / George Garcia | Chevrolet Corvette | Javier Garcia | 2:55.7900 |
| 9th | 38 | John Paul | Porsche Carrera RSR | John Paul Sr. | 2:58.4990 |
| 10th | 65 | John Morton / Bobby Carradine | Ferrari 365 GTB/4 | Modena Sports Cars | 2:58.7990 |
| 11th | 58 | Diego Febles / Hiram Cruz | Porsche 911 Carrera RSR | Diego Febles Racing | 2:59.5610 |
| 12th | 86 | Hugh Kleinpeter / Jef Stevens | De Tomaso Pantera | H. I. Kleinpeter | 2:59.5670 |
| 13th | 8 | Bob Beasley / George Stone | Porsche Carrera RSR | Bob Beasley | 3:00.2130 |
| 14th | 64 | Bob Bondurant / Dick Smothers / Milt Minter | Ferrari 365 GTB/4 | Ramsey Ferrari of SF | 3:00.4970 |
| 15th | 40 | Dave Heinz / R. V. Shulnburg | Chevrolet Corvette | Shulnburg Scrap Metal | 3:00.6740 |
| 16th | 24 | Tom Frank / Carl Shafer | Porsche Carrera RSR | Executive Industries | 3:01.2710 |
| 17th | 07 | Charles Mendez / Dave Cowart | Porsche Carrera RSR | Morrison's Inc. | 3:02.1870 |
| 18th | 66 | Ralph Noseda / Richard Small / Jeff Loving | Chevrolet Camaro | Ralph Noseda | 3:03.6180 |
| 19th | 9 | Rudy Bartling / Klaus Bytzek | Porsche Carrera RSR | Bytzek Automotive | 3:03.6610 |
| 20th | 41 | Herb Jones, Jr. / Steve Faul | Chevrolet Camaro | Jones Ind. Racing | 3:04.1120 |
| 21st | 48 | John Carusso / Luis Sereix / Emory Donaldson | Chevrolet Corvette | Autodyne | 3:04.8780 |
| 22nd | 46 | Mauricio DeNarvaez / Albert Naon | Porsche 911 Carrera RSR | Mauricio DeNarvaez | 3:05.1010 |
| 23rd | 67 | Dave White / David McClain | Porsche 911 S | Havatampa Cigars | 3:05.2260 |
| 24th | 72 | Bill Arnold / Billy Hagan | Chevrolet Corvette | Bill Arnold | 3:06.7360 |
| 25th | 1 | Michael Keyser / Harry Jones | Ferrari 365 GTB/4 | Harry Jones | 3:07.1030 |
| 26th | 80 | Fred Lang / Carm Solomone | Chevrolet Camaro | Carmon Solomone | 3:08.0390 |
| 27th | 60 | Rusty Bond / Ren Tilton | Porsche 911 S | R & R Racing | 3:08.0630 |
| 28th | 88 | Jim Borsos | Porsche 911 S | | 3:08.0940 |
| 29th | 01 | Bob Bergstrom / Jim Cook | Porsche 911 S | Sports Ltd. Racing | 3:08.2720 |
| 30th | 57 | John Tunstall | Porsche Carrera RSR | Starbrite | 3:09.6350 |
| 31st | 39 | Wiley Doran / Jim Barnett / Charles Pelz | Chevrolet Corvette | Wiley Doran | 3:10.1000 |
| 32nd | 51 | Robert Kirby / John Hotchkis | Porsche 914/6 | Kirby-Hitchcock Racing | 3:11.7080 |
| 33rd | 92 | Mike Tillson / David Olimpi | Porsche Carrera | Mike Tillson Motor Racing | 3:12.3660 |
| 34th | 71 | Tom Bagley / Chip Mead | Porsche 911 S | The Foreign Exchange | 3:14.8090 |
| 35th | 06 | Dave Panaccione / Gary Mesnick / J. Dana Roehrig | Porsche 911 T | Morrison's Inc. | 3:14.9510 |
| 36th | 19 | Gene Felton / Richard Bostyan | Chevrolet Corvette | Richard Bostyan | 3:14.9890 |
| 37th | 85 | John Hulen / Ron Coupland / Dave Causey | Porsche 914/6 | John Hulen | 3:15.0720 |
| 38th | 77 | Bruce Jennings / Bill Bean | Porsche 911 S | Bruce Jennings | 3:15.7590 |
| 39th | 49 | Sam Fillingham / K. P. Jones / Mike Williamson | Chevrolet Corvette | Fillingham Racing | 3:15.7910 |
| 40th | 2 | Bill Freeman / Paul Newman | Porsche 911 S | Bill Freeman | 3:16.0770 |
| 41st | 11 | Gary Nylander / Bobbee Nylander / Michael Hammond | Porsche 911 S | Motoring Enthusiasts | 3:16.6840 |
| 42nd | 18 | Jack Swanson / Wayne Miller | Chevrolet Camaro | Terry Wolters | 3:16.9170 |
| 43rd | 78 | Phil Francis / Eugenio Matienzo / Tom Nowling | Chevrolet Camaro | | 3:17.8130 |
| 44th | 10 | Hans Berner / Willy Goebbels | Porsche Carrera | Motex Auto | 3:18.2930 |
| 45th | 17 | Tim Chitwood / Vince Gimondo / Joie Chitwood | Chevrolet Nova | Chitwood Racing | 3:18.9510 |
| 46th | 55 | Jim Fitzgerald / Rick Thompkins | Chevrolet Corvette | Rick Thompkins | 3:19.0430 |
| 47th | 73 | Clark Howey / Dale Koch / David Crabtree | Chevrolet Corvette | Howey Farms | 3:19.9440 |
| 48th | 54 | Hal Sahlman / Preston Henn / Steve Cook | Porsche 914/6 | Spirit Racing | 3:21.2300 |
| 49th | 94 | Tony Ansley / Charles Gano / Ron Connelly | Chevrolet Corvette | Tony Ansley | 3:21.7520 |
| 50th | 36 | Tico Almeida / Rene Rodriguez / Manuel Quintana | Chevrolet Camaro | Motorcito Racing | 3:22.4960 |
| 51st | 50 | Gerhard Hirsch / Fritz Hochreuter / Rainer Brezinka | Porsche 911 S | Motex Auto | 3:24.3060 |
| 52nd | 29 | Bonky Fernandez / Manuel Godinez / Tato Ferrer | Lotus Elan | Bonky Fernandez | 3:24.3100 |
| 53rd | 99 | George Shafer / Craig Shafer / Dick Scott | Datsun 240Z | George Shafer/Craig Shafer | 3:26.2900 |
| 54th | 5 | Pedro Vazquez / Bill Wolfe | Porsche 911 S | Pedro Vazquez | 3:28.0700 |
| 55th | 08 | Terry Wolters / Lawrence P. Pleasants | Porsche 911 S | Busch Beer | 3:29.3460 |
| 56th | 70 | M. L. Speer / Windle Turley | Porsche 911 S | Race Car | 3:30.4870 |
| 57th | 37 | Rollie Walriven / Slim Helson | Chevrolet Camaro | | 3:30.6090 |
| 58th | 22 | Bill King / Jon Lehew | Datsun 240Z | Angel's Auto World | 3:31.8560 |
| 59th | 20 | Vince DiLella / Manuel Cueto | Porsche 914/4 | Vince DiLella | 3:32.1230 |
| 60th | 82 | Tom Ross / Paul Tavilla | Ford Mustang | Tom Ross | 3:32.1930 |
| 61st | 7 | Anatoly Arutunoff / José Marina / Brian Goellnicht | Lancia Stratos | Hallet Motor Racing Circuit | 3:36.5540 |
| 62nd | 44 | Neil Potter / William Boyer | Ford Mustang | Neil Potter | 3:41.1550 |
| 63rd | 31 | Paul Bowden / Jimmy Tumbleston / Kenneth LaGrow | Chevrolet Camaro | Kenneth LaGrow | 3:42.2750 |
| 64th | 93 | Ralph Tolman / Jim Fitzgerald / Mike Brockman | Lotus Europa | Ralph Tolman | 3:42.9860 |
| 65th | 4 | Mark Leuzinger / H. David Redszus / Mike Van der Werff | De Tomaso Pantera | B. R. Racing | 3:44.4770 |
| 66th | 28 | Gene Budd / Walter Johnston | Alfa Romeo Alfetta | Paul Spruell | 3:47.0840 |
| 67th | 03 | Ron Oyler / Carlos Muratti / Martinas Smit | Renault R12 | | 3:48.7720 |
| 68th | 52 | Charles Kleinschmidt / Guido Levetto | MGB GT | Charles Kleinschmidt | 3:53.6110 |
| 69th | 26 | Louis McAlpine / Ernie Smith | Alfa Romeo Alfetta GTV | Alfa Romeo South | 4:03.0060 |
| 70th | 27 | Ray Mummery / Jack Refenning / Joseph Hamilton | Porsche 911 S | Miami Auto Racing | no time |
| 71st | 79 | Don Nooe | Shelby GT350 | | no time |
| 72nd | 91 | Fred Werl / Jay C. Miller / Dan Slodowick | Ford Mustang | Fred Werl | no time |
| 73rd | 95 | Marty Hinze / Robert E. Davis | Chevrolet Corvette | Robert E. Davis | no time |
| 74th | 98 | Juan Montalvo / Tony Garcia / Jorge DeCardenas | Porsche 911 S | Conrad Racing | no time |