| 1 | 3 | 1. S | Martini International Racin | Vic Elford · Gérard Larrousse | Porsche 917K | — | 260 | WSPR historical record |
| 2 | 33 | 1. P3.0 | Autodelta SpA | Nanni Galli · Rolf Stommelen | Alfa Romeo T33/3 | — | 257 | WSPR historical record |
| 3 | 32 | 2. P3.0 | Autodelta SpA | Andrea de Adamich · Henri Pescarolo · Nino Vaccarella | Alfa Romeo T33/3 | — | 248 | WSPR historical record |
| 4 | 2 | 2. S | John Wyer Automotive | Pedro Rodriguez · Jackie Oliver | Porsche 917K | — | 248 | WSPR historical record |
| 5 | 1 | 3. S | John Wyer Automotive | Jo Siffert · Derek Bell | Porsche 917K | — | 244 | WSPR historical record |
| 6 | 6 | 4. S | Roger Penske/Kirk F. White | Mark Donohue · David Hobbs | Ferrari 512M | — | 243 | WSPR historical record |
| 7 | 48 | 1. GT+2.5 | John Greenwood | John Greenwood · Dick Smothers | Chevrolet Corvette | — | 218 | WSPR historical record |
| 8 | 21 | 3. P3.0 | North American Racing Team | Luigi Chinetti, Jr. · George Eaton | Ferrari 312P/71 | — | 213 | WSPR historical record |
| 9 | 31 | 1. GT2.5 | Waterville Estates | Jim Locke · Bert Everett | Porsche 911T | — | 203 | WSPR historical record |
| 10 | 57 | 2. GT+2.5 | Dave Heinz Racing | Dave Heinz · Robert R. Johnson · Or Costanzo | Chevrolet Corvette | — | 199 | WSPR historical record |
| 11 | 39 | 1. T2.5 | K & T Enterprises | Ash Tisdelle · Peter Kirill | Porsche 911S | — | 199 | WSPR historical record |
| 12 | 24 | 5. S | North American Racing Team | Harley Cluxton · Bob Grossman | Ferrari 365 GTB/4 | — | 195 | WSPR historical record |
| 13 | 47 | 1. T+2.5 | Bruce Behrens Racing | John Tremblay · Bill McDill | Chevrolet Camaro | — | 193 | WSPR historical record |
| 14 | 59 | GT2.5 28 | umos Porsche Audi Corp. 19 | Peter Gregg · Hurley Haywood | Porsche 914/6 GT ASK US Br | — | 2 | WSPR historical record |
| 15 | 89 | 2. T+2.5 | H. Houghton Smith | Bert Gafford · Houghton Smith | Chevrolet Camaro | — | 191 | WSPR historical record |
| 16 | 81 | 3. GT2.5 | Ray Walle Enterprises | Ray Walle · Tom Davey · Tom Reddy | Porsche 911S | — | 187 | WSPR historical record |
| 17 | 5 | GT2.5 39 | cques Duval 18 | Jacques Duval · George Nicholas · Bob Bailey | Porsche 914/6 GT ASK US Ja | — | 7 | WSPR historical record |
| 18 | 19 | 3. T+2.5 | Thomas T. Ciccone, Jr. | Tom Ciccone · Len Greenhalgh · Dick Roberts | Chevrolet Camaro | — | 183 | WSPR historical record |
| 19 | 14 | 4. T+2.5 | Boykin Auto Repair | C. C. Canada · Bob Christiansen | Chevrolet Camaro | — | 183 | WSPR historical record |
| 20 | 40 | 5. GT2.5 | Bozzani Porsche Inc. | John Hotchkis · Robert Kirby | Porsche 911S | — | 180 | WSPR historical record |
| 21 | 60 | 6. GT2.5 | Wheel Sport Enterprises | Michael Walker · Daryl Springer | Porsche 911S | — | 176 | WSPR historical record |
| 22 | 72 | 5. T+2.5 | Robert R. Mitchell | Bob Mitchell · Charlie Kemp | Chevrolet Camaro | — | 158 | WSPR historical record |
| 23 | 84 | T2.5 | Del Taylor | Ron Goldleaf · Del Russo Taylor · Bob Wheat | Alfa Romeo GTV | — | 148 | WSPR historical record |
| 24 | 63 | 6. T+2.5 | Preston Hood Chevrolet | John Elliott · Don Gwynne, Jr. | Chevrolet Camaro | — | 142 | WSPR historical record |
| 25 | 74 | S | Dr. Mervin Rosen | Merv Rosen · Dick Jacobs | Porsche 906 | — | 172 | WSPR historical record |
| 26 | 11 | GT+2.5 | Troy Promotions Inc. | Don Yenko · Tony DeLorenzo · Jerry Thompson | Chevrolet Corvette | — | 150 | WSPR historical record |
| 27 | 17 | P2.0 | Ring Free Oil Racing Team | Tom Fraser · Charles Reynolds · Jean Sage · Clive Baker | Chevron B16 BMW | — | 141 | WSPR historical record |
| 28 | 42 | T+2.5 | Garcia Racing | Luis Sereix · Javier Garcia · Ralph Noseda | Chevrolet Camaro | — | 133 | WSPR historical record |
| 29 | 29 | GT2.5 31 | lph Meaney Inc. 11 | Stephen Behr · Charles Pete Conrad · John Buffum | Porsche 914/6 GT ASK US Ra | — | 2 | WSPR historical record |
| 30 | 66 | T+2.5 | Performance Automobile | Richard Small · Robert Fordyce · DNS - Jerry Lipke | Chevrolet Camaro | — | 111 | WSPR historical record |
| 31 | 28 | GT2.5 30 | lph Meaney Inc. 18 | Ralph Meaney · Gary Wright · Forry Laucks | Porsche 914/6 GT ASK US Ra | — | 7 | WSPR historical record |
| 32 | 22 | S | North American Racing Team | Peter Revson · Swede Savage | Ferrari 512M | — | 169 | WSPR historical record |
| 33 | 58 | S | Nationwide Food Brokers | Mike Rahal · Werner Frank · Hugh Wise | Porsche 906 | — | 167 | WSPR historical record |
| 34 | 61 | P2.0 | Promotional Advertising Cor | Hugh Kleinpeter · Tony Belcher | Lola T210 Ford | — | 161 | WSPR historical record |
| 35 | 88 | T+2.5 | S-Car-Go Racing | John Oliver · John Maynard · Peter Flanagan | Chevrolet Camaro | — | 131 | WSPR historical record |
| 36 | 25 | P3.0 | SpA Ferrari SEFAC | Mario Andretti · Jacky Ickx | Ferrari 312PB | — | 117 | WSPR historical record |
| 37 | 23 | S | North American Racing Team | Ronnie Bucknum · Sam Posey | Ferrari 512S | — | 114 | WSPR historical record |
| 38 | 16 | P2.0 | Ring Free Oil Racing Team | Bobby Rinzler · Clive Baker | Chevron B16 Ford | — | 113 | WSPR historical record |
| 39 | 86 | GT+2.5 | Cliff Gottlob | Cliff Gottlob · Ed Lowther · DNS - Bob Nagel | Chevrolet Corvette | — | 108 | WSPR historical record |
| 40 | 43 | T+2.5 | Garcia Racing | Manuel Garcia · Santiago Gonzalez · Norberto Mastandrea | Chevrolet Chevy II | — | 103 | WSPR historical record |
| 41 | 45 | T+2.5 | Reventlow-Pettey Autos | Paul Pettey · Tom Dutton | Ford Mustang | — | 95 | WSPR historical record |
| 42 | 38 | T+2.5 | John P. Belperche | Manuel Quintana · John Belperche · Reinaldo Almeida | Shelby GT500 | — | 76 | WSPR historical record |
| 43 | 35 | T+2.5 | Collins-Wilson Racing Enter | Larry Wilson · Vincent P. Collins | Chevrolet Camaro | — | 64 | WSPR historical record |
| 44 | 54 | P2.0 | Automobiles of Italy | Anatoly Arutunoff · Bill Pryor · Brian Goellnicht | Abarth 2000SP | — | 61 | WSPR historical record |
| 45 | 71 | T+2.5 | Takondo Racing | Vince Gimondo · Chuck Dietrich | Chevrolet Camaro | — | 61 | WSPR historical record |
| 46 | 56 | P2.0 | Josef Greger | Sepp Greger · Hans-Dieter Weigel | Porsche 907 | — | 53 | WSPR historical record |
| 47 | 50 | GT+2.5 | John Greenwood | Allan Barker · Gene Harrington | Chevrolet Corvette | — | 50 | WSPR historical record |
| 48 | 12 | GT+2.5 | Troy Promotions Inc. | Jerry Thompson · John Mahler | Chevrolet Corvette | — | 42 | WSPR historical record |
| 49 | 46 | T+2.5 | Sebring Racing Inc. | Bob Gray · Terry Keller · Len Magner | Ford Mustang | — | 39 | WSPR historical record |
| 50 | 52 | GT2.5 | Waldron Motors Racing | Ben Scott · Lowell Lanier · Dave Houser | MGB | — | 35 | WSPR historical record |
| 51 | 20 | S | Young American Racing Team | Masten Gregory · Gregg Young | Ferrari 512M | — | 29 | WSPR historical record |
| 52 | 34 | P3.0 | Autodelta SpA | Nino Vaccarella · Toine Hezemans | Alfa Romeo T33/3 | — | 27 | WSPR historical record |
| 53 | 51 | GT2.5 | Waldron Motors Racing | Jim Gammon · Dean Donley · DNS - Carlos Garza | MGB | — | 25 | WSPR historical record |
| 54 | 15 | GT2.5 | Toad Hall Racing | Michael Keyser · Bruce Jennings | Porsche 911S | — | 23 | WSPR historical record |
| 55 | 26 | S | North American Racing Team | Chuck Parsons · David Weir | Ferrari 512S | — | 20 | WSPR historical record |
| 56 | 92 | T+2.5 | B. F. Goodrich Tire Co. | John Cordts · Don Pike | Chevrolet Camaro | — | 6 | WSPR historical record |
| 57 | 18 | P2.0 | Ring Free Oil Racing Team | Janet Guthrie · Rosemary Smith · DNS - Jennifer Birrell | Chevron B16 Ford | — | 1 | WSPR historical record |
| did_not_start | 64 | GT+2.5 | Bob Baechle | Bob Baechle · Robert Luebbe | Chevrolet Corvette | — | | WSPR historical record |
| did_not_qualify | 7 | GT+2.5 | Randy Blessing | Mike Rand · Randy Blessing | Shelby Cobra | — | | WSPR historical record |
| did_not_qualify | 9 | GT+2.5 | Simone N. Fleming | Paul Fleming · Amos Johnson · Bill Barnes | Chevrolet Corvette | — | | WSPR historical record |
| did_not_qualify | 53 | T2.5 | Marion E. Dickson | Warren F. Drescher · Robert Luchette | Ford Cortina Lotus | — | | WSPR historical record |
| did_not_qualify | 55 | T2.5 | Don Kearney | Bobby Clark · Ray Kessler · Don Kearney | Datsun 510 | — | | WSPR historical record |
| did_not_qualify | 69 | T2.5 | Triton Racing | John F. Howard · Raymond Gage | Ford Escort | — | | WSPR historical record |
| did_not_qualify | 78 | T2.5 | George W. Sanderson | Ronald D. Polimeni · Robert Theall | Volvo 122S | — | | WSPR historical record |
| did_not_qualify | 80 | T2.5 | Jack Baldwin | Jack Baldwin · Jerry Jacob | Datsun 510 | — | | WSPR historical record |
| did_not_qualify | 83 | T2.5 | Juan Montalvo | Juan Montalvo · Tony Garcia · Alfonso Gomez-Mena | BMW 2002 | — | | WSPR historical record |
| source_section_did_not_practice | T | S | John Wyer Automotive | Jo Siffert | Porsche 917K | — | | WSPR historical record |
| entry_only | 10 | GT+2.5 | William A. Schumacher | Bill Schumacher · Bob Kiefer | Chevrolet Corvette | — | | WSPR historical record |
| entry_only | 82 | T2.5 | Pro-Race | Robert Whitaker · John Tunstall | Alfa Romeo GTA | — | | WSPR historical record |