| 1 | 54 | 1. P | Porsche System Engineering | Vic Elford · Jochen Neerspasch · Jo Siffert · Rolf Stommelen · Hans Herrmann | Porsche 907 LH 2.2 | — | 673 | WSPR historical record |
| 2 | 52 | 2. P | Porsche System Engineering | Jo Siffert · Hans Herrmann · DNS - Gerhard Mitter | Porsche 907 LH 2.2 | — | 659 | WSPR historical record |
| 3 | 51 | 3. P | Porsche System Engineering | Jo Schlesser · Joe Buzzetta | Porsche 907 LH 2.2 | — | 659 | WSPR historical record |
| 4 | 1 | 1. TA+2.0 | Shelby Racing Corporation | Jerry Titus · Ronnie Bucknum | Ford Mustang | — | 629 | WSPR historical record |
| 5 | 20 | 4. P | Autodelta SpA | Udo Schütz · Nino Vaccarella | Alfa Romeo T33/2 | — | 617 | WSPR historical record |
| 6 | 23 | 5. P | Autodelta SpA | Mario Andretti · Lucien Bianchi | Alfa Romeo T33/2 | — | 609 | WSPR historical record |
| 7 | 22 | 6. P | Autodelta SpA | Mario Casoni · Giampiero Biscaldi · Teodoro Zeccoli | Alfa Romeo T33/2 | — | 594 | WSPR historical record |
| 8 | 34 | 1. S | Raceco of Miami | John Gunn · Guillermo Ortega · Fausto Merello | Ferrari 250LM | — | 592 | WSPR historical record |
| 9 | 59 | 1. TA2.0 | Brumos Porsche | Peter Gregg · Sten Axelsson | Porsche 911 | — | 589 | WSPR historical record |
| 10 | 31 | 1. GT | Sunray DX Oil | Jerry Grant · Dave Morgan | Chevrolet Corvette | — | 586 | WSPR historical record |
| 11 | 77 | 2. TA2.0 | Lewis Wiliams, Jr. | Robert Stoddard · George Drolsom · Gifford · Lewis Williams, Jr. | Porsche 911 | — | 575 | WSPR historical record |
| 12 | 6 | 2. TA+2.0 | Penske-Hilton Racing | Mark Donohue · Bob Johnson · Craig Fisher | Chevrolet Camaro | — | 565 | WSPR historical record |
| 13 | 56 | 3. TA2.0 | John Kelly | Jim Netterstrom · John Kelly · John Sabel | Porsche 911 | — | 565 | WSPR historical record |
| 14 | 3 | 7. P | HRH | Jim McDaniel · Glen Sullivan | Porsche 911R | — | 562 | WSPR historical record |
| 15 | 36 | 4. TA2.0 | Wilbur Pickett | Wilbur Pickett · Bill Bean · Bill Bencker | Porsche 911 | — | 545 | WSPR historical record |
| 16 | 68 | 3. TA+2.0 | William Boye | Bill Boye · Billy Yuma | Chevrolet Camaro | — | 540 | WSPR historical record |
| 17 | 71 | 4. TA+2.0 | Chitwood Racing | Joie Chitwood · Buzz Barton | Chevrolet Camaro | — | 536 | WSPR historical record |
| 18 | 61 | 2. GT | Jean-Pierre Hanrioud | Jean-Pierre Hanrioud · Sylvain Garant | Porsche 911S | — | 534 | WSPR historical record |
| 19 | 64 | 5. TA2.0 | Bruce Myers | Del Russo Taylor · Bob Pratt · Bruce Myers | Alfa Romeo GTA | — | 533 | WSPR historical record |
| 20 | 24 | 6. TA2.0 | Autodelta SpA | Leo Cella · Teodoro Zeccoli · Giampiero Biscaldi | Alfa Romeo GTA | — | 529 | WSPR historical record |
| 21 | 78 | 5. TA+2.0 | — | Sam Posey · Jim Kauffman | Ford Mustang | — | 523 | WSPR historical record |
| 22 | 28 | 3. GT | Corvette Racing Associates | Edward Ross · H. Craige Pelouze | Chevrolet Corvette Converti | — | 515 | WSPR historical record |
| 23 | 15 | 6. TA+2.0 | Randy's Auto Body | Bob Grossman · Bob Dini | Ford Mustang | — | 514 | WSPR historical record |
| 24 | 10 | 8. P | Nomad | Tony Lanfranchi · Mark Konig | Nomad Mk.1 Ford | — | 506 | WSPR historical record |
| 25 | 29 | 4. GT | Sunray DX Oil | Peter Revson · Don Yenko | Chevrolet Corvette | — | 496 | WSPR historical record |
| 26 | 73 | 7. TA2.0 | Fred Opert Racing Team | Fred Opert · Joe Grimaldi | Porsche 911 | — | 471 | WSPR historical record |
| 27 | 30 | 5. GT | Sunray DX Oil | Jerry Thompson · Tony DeLorenzo | Chevrolet Corvette | — | 470 | WSPR historical record |
| 28 | 32 | TA2.0 | Jack Ryan | Jack Ryan · Pete Harrison | Porsche 911 | — | 393 | WSPR historical record |
| 29 | 44 | GT | American International Raci | Dick Guldstrand · Ed Leslie · Scooter Patrick · Dave Jordan | Chevrolet Cor | — | 373 | WSPR historical record |
| 30 | 35 | GT | Aztec Racing | George Waltman | Morgan Plus 4 | — | 338 | WSPR historical record |
| retired | 67 | GT | Bruce Hollander | Hugh Kleinpeter · Ray Mummery · Bruce Hollander | Shelby GT350 | — | 510 | WSPR historical record |
| retired | 18 | S | E. S. Nelson | Edward Nelson · Mike Hailwood | Ford GT40 | — | 507 | WSPR historical record |
| retired | 9 | S | John Wyer Automotive | Paul Hawkins · David Hobbs | Ford GT40 | — | 430 | WSPR historical record |
| retired | 12 | P | Paul Vestey | Paul Vestey · Roy Pike · Paul Ridgway | Ferrari 250LM | — | 264 | WSPR historical record |
| retired | 45 | GT | American International Raci | Scooter Patrick · Dave Jordan · Herb Caplan | Chevrolet Cor | — | 262 | WSPR historical record |
| retired | 25 | TA2.0 | Autodelta SpA | Enrico Pinto · Spartaco Dini | Alfa Romeo GTA | — | 235 | WSPR historical record |
| retired | 41 | GT | Thomas D. Harris | James Rushin · Thomas D. Harris · Chris Waldron | MGB | — | 226 | WSPR historical record |
| retired | 49 | TA2.0 | Ike A. Maxwell, Jr. | Ike A. Maxwell, Jr. · William J. Martin | Volvo 122S | — | 188 | WSPR historical record |
| retired | 27 | P | Algar Enterprises | Carlo Facetti · Giancarlo Baghetti · Ove Andersson | Lancia Fulvia HF | — | 180 | WSPR historical record |
| retired | 48 | GT | Doyle Poole | Doyle Poole · Stott · Bruce Morehead · DNS - Thomas D. Harris | Triumph TR4A | — | 179 | WSPR historical record |
| retired | 2 | TA+2.0 | Shelby Racing Corporation | Allan Moffat · Horst Kwech · George Follmer | Ford Mustang | — | 176 | WSPR historical record |
| retired | 43 | GT | Cannon Auto | Carl Schwenker · Ara Dube · Dana Kelder | Triumph TR4A | — | 166 | WSPR historical record |
| retired | 57 | GT | Richard P- Cline | Richard Cline · Michael Pickering | Triumph GT6 | — | 120 | WSPR historical record |
| retired | 7 | TA+2.0 | Billy Hagan | Billy Hagan · John McVeigh · Frans Gillebard | Mercury Cougar | — | 119 | WSPR historical record |
| retired | 11 | P | Chevron Cars | Digby Martland · Brian Classick | Chevron B6 BMW | — | 118 | WSPR historical record |
| retired | 58 | GT | Richard Cline | Fred Andrews, Jr. · Richard G. Kondracki | Triumph Spitfire | — | 106 | WSPR historical record |
| retired | 53 | P | Porsche System Engineering | Gerhard Mitter · Rolf Stommelen · DNS - Hans Herrmann | Porsche 907 LH 2.2 | — | 104 | WSPR historical record |
| retired | 81 | S | North American Racing Team | David Piper · Masten Gregory | Ferrari 250LM | — | 101 | WSPR historical record |
| retired | 55 | P | Squadra Tartaruga | Rico Steinemann · Dieter Spoerry | Porsche 907 LH 2.0 | — | 100 | WSPR historical record |
| retired | 47 | GT | John Cameron | Milo Vega · John Witt · DNS - John Cameron | Triumph TR4A | — | 96 | WSPR historical record |
| retired | 65 | TA+2.0 | Malcolm Starr | George Wintersteen · Malcolm Starr | Ford Mustang | — | 90 | WSPR historical record |
| retired | 17 | GT | Arthur Mollin | Arthur Mollin · Nick Cone | TVR Mk IV | — | 86 | WSPR historical record |
| retired | 72 | TA2.0 | Marvin Davidson | Paul Richards · Tony Adamowicz · Marvin Davidson | Porsche 911T | — | 71 | WSPR historical record |
| retired | 8 | S | John Wyer Automotive | Jacky Ickx · Brian Redman | Ford GT40 | — | 58 | WSPR historical record |
| retired | 46 | GT | Grant Miller | Steven Payne-Herbert · Grant Miller · Roger Walton | Porsche 356B Carrera 2 | — | 46 | WSPR historical record |
| retired | 80 | P | North American Racing Team | Pedro Rodriguez · Charlie Kolb | Ferrari Dino 206S | — | 45 | WSPR historical record |
| retired | 42 | GT | Richard Robson | Rajah Rodgers · Richard Robson · Bill Buchman | Jaguar XK-E | — | 43 | WSPR historical record |
| retired | 37 | S | William Wonder | William Wonder · Ray Cuomo | Ford GT40 | — | 42 | WSPR historical record |
| retired | 4 | TA+2.0 | HRH | John Moore · Jim Murphy | Chevrolet Camaro | — | 34 | WSPR historical record |
| retired | 76T | P | Howmet Corporation | Ray Heppenstall · Ed Lowther · Dick Thompson | Howmet TX Continental | — | 34 | WSPR historical record |
| retired | 5 | TA+2.0 | Bud Sherk | Bud Sherk · Billy Diehl | Dodge Dart | — | 20 | WSPR historical record |
| retired | 26 | P | Algar Enterprises | Claudio Maglioli · Ove Andersson · Giancarlo Baghetti | Lancia Fulvia Zagato | — | 6 | WSPR historical record |
| retired | 14 | TA2.0 | Bob Holbert | Frank Everett · Bruce Jennings · Bob Bailey | Porsche 911S | — | 3 | WSPR historical record |
| did_not_start | 13 | TA+2.0 | Smokey Yunick | Bruce McLaren · Jim Hall | Chevrolet Camaro | — | | WSPR historical record |
| did_not_start | 19 | S | D-K Racing | E. Dale Keenan · Daniel J. Torpy · James Sutter | Chevrolet Corvette | — | | WSPR historical record |
| did_not_start | 96 | GT | Vince Gimondo | John Tremblay · Billy Dingman · Vince Gimondo | Chevrolet Corvette | — | | WSPR historical record |
| source_section_running_in_practice | 22T | P | Autodelta SpA | Mario Casoni | Alfa Romeo T33/2 | — | | WSPR historical record |
| source_section_running_in_practice | 76 | | Howmet Corporation | Ray Heppenstall · Ed Lowther · Dick Thompson | Howmet TX Continental | — | | WSPR historical record |
| source_section_did_not_practice | 21 | P | Autodelta SpA | Nanni Galli · Ignazio Giunti | Alfa Romeo T33/2 | — | | WSPR historical record |
| entry_only | 16 | TA+2.0 | Roger Penske | Craig Fisher | Chevrolet Camaro | — | | WSPR historical record |
| entry_only | 50 | P | Hubert Giraud | Johnny Rives · Philippe Marchesi | Hrubon - Renault | — | | WSPR historical record |
| entry_only | 51 | P | Levallois-Perret | Jean-Pierre Jabouille · Jean-Claude Guenard | Marcos Mini GT | — | | WSPR historical record |
| entry_only | 60 | TA+2.0 | Earle Canavan | Earle Canavan · Bill Kane · Ray Sitterly | AMC Javelin | — | | WSPR historical record |
| entry_only | 75 | TA+2.0 | Norberto Mastandrea | Norberto Mastandrea · Ralph Noseda | Chevrolet Camaro | — | | WSPR historical record |
| entry_only | 82 | S | North American Racing Team | xxx | Ferrari 275 GTB/2 | — | | WSPR historical record |