| No | 
Pilote | 
Team | 
Voiture | 
| 1 | Jacky Ickx/Jackie Oliver | John Wyer Automotive Engine | Ford GT40 | 
| 2 | David Hobbs/Mike Hailwood | John Wyer Automotive Engine | Ford GT40 | 
| 4 |  Jim McDaniel/Steve Pieper/Bill Scott | HRH Corporation | Zink VSR Volkswagen | 
| 5 | Bob Grossman/Bob Dini | Randy's Auto Body | Chevrolet Camaro | 
| 6 | Mark Donohue/Chuck Parsons | Roger Penske Sunoco Racing | Lola T70 Mk.3B | 
| 7 | William Wonder/Ray Cuomo | Bill Wonder | Ford GT40 | 
| 8 | Ed Leslie/Lothar Motschenbacher | American International Racing | Lola T70 Mk.3 | 
| 9 | Scooter Patrick/Dave Jordan | American International Racing | Lola T70 Mk.3 | 
| 11 | Don Yenko/Dick Guldstrand | Best Photo | Chevrolet Camaro | 
| 14 | Bert Everett/Alan Johnson/E.Linley Coleman | Fine Grinding | Porsche 911 | 
| 15 | Larry Bock/Larry Dent | Larry Drover | Chevrolet Camaro | 
| 16 | Wedge Rafferty/Jack Gearhart/Richard Wisler | Wes Rafferty | Chevrolet Corvette | 
| 17 | David McClain/Or Costanzo | David H. McClain | Chevrolet Camaro | 
| 18 | Maurice Carter/Nat Adams | Maurice Carter | Chevrolet Camaro | 
| 19 | Charles Buckley/L. Gordon Cooper | Bud Moore | Mercury Cougar | 
| 20 | Tony Adamowicz/Bruce Jennings/Herb Wetanson | Herb Wetanson | Porsche 911T | 
| 21 | Jim Netterstrom/John Kelly | Porsche America Racing | Porsche 911 | 
| 22 | Bob Bailey/Jim Locke/Mike Downs | Porsche America Racing | Porsche 911 | 
| 24 | Johnny Servoz-Gavin/Henri Pescarolo | Equipe Matra Shell | Matra-Sports 630M | 
| 25 | Eduardo Dibos-Chappuis/Mario Calabattisti | Motoritalia | Alfa Romeo T33/2 | 
| 26 | Jerry Titus/Jon Ward | Jon Ward | Pontiac Firebird | 
| 28 | Jim Corwin/Mike Manner/Carson Baird | Jim Corwin | Chevrolet Camaro | 
| 32 | Harold Rose/Mike Richards | Harold Rose | Chevrolet Camaro | 
| 33 | John McComb/Dave Dooley | Harold McComb | Ford Mustang | 
| 36 | Wilbur Pickett/Mike Downs | Wilbur Pickett | Porsche 911 | 
| 38 | Fausto Merello/Umberto Maglioli/Edward Alvarez | Team Raceco of Miami | Ferrari 250LM | 
| 39 |  Hugh Kleinpeter/Bob Beatty/John Gunn | Team Raceco of Miami | Chevron B8 BMW | 
| 40 | Charlie Kolb/Giampiero Biscaldi | North American Racing Team | Ferrari Dino 206S | 
| 41 | Sam Posey/Riccardo Rodriguez | North American Racing Team | Ferrari 275 GTB/C | 
| 43 | Gary Wright/Bill Craine | Gary Wright | Porsche 911 | 
| 45 | George Waltman/Wallis Bird | George Waltman | Osca 1600 GT2 Maserati | 
| 46 | John Debo/E. M. Parkerson | Bud Boles | Triumph TR4 | 
| 47 | Harold Williamson/George Drolsom | Harold Williamson | Porsche 911 | 
| 48 | André Wicky/Sylvain Garant | Wicky Racing Team | Porsche 911T | 
| 50 | Jo Siffert/Hans Herrmann | Porsche System Engineering | Porsche 908L | 
| 51 | Richard Attwood/Joe Buzzetta | Porsche System Engineering | Porsche 908L | 
| 52 | Vic Elford/Brian Redman | Porsche System Engineering | Porsche 908L | 
| 53 |  Udo Schütz/Gerhard Mitter/Richard Attwood | Porsche System Engineering | Porsche 908L | 
| 54 | Rolf Stommelen/Kurt Ahrens Jr | Porsche System Engineering | Porsche 908L | 
| 55 | Jim Gammon/Ray Mummery | Chris Waldron | MGB | 
| 56 | Thomas D. Harris/Chris Waldron/Ben Scott | Chris Waldron | MGB | 
| 57 | Dave Heinz/Clarence Moerwald | David Heinz | MGB | 
| 58 | Alex Soler-Roig/Rudi Lins | Alex Soler-Roig | Porsche 907 | 
| 59 | Peter Gregg/Sten Axelsson | Brumos Porsche | Porsche 911 | 
| 60 | Jo Bonnier/Ulf Norinder | Sportscars Unlimited | Lola T70 Mk.3B | 
| 61 | Masten Gregory/Richard Broström | Sportscars Unlimited | Porsche 910 | 
| 62 | Rudy Bartling/Fritz Hochreuter/Rainer Brezinka | Rainer Brezinka | Porsche 906 | 
| 66 | Tony DeLorenzo/Dick Lang | Sting Ra Owens Corning Fiberglass | Chevrolet Corvette | 
| 67 | Jerry Thompson/Jim Harrell/Tony DeLorenzo | Sting Ra Owens Corning Fiberglass | Chevrolet Corvette | 
| 68 | Jacques Duval/George Nicholas | Jacques Duval | Porsche 911T | 
| 69 | Ed Lowther/Robert D.Esseks/Frank Dominianni | Robert D. Esseks | Chevrolet Corvette | 
|  72 | Billy Hagan/John McVeigh/Frans Gillebard | Lafayette Speed Center | Mercury Cougar | 
| 73 | Fred Opert/Paul Sanford | Fred Opert Racing Team | Porsche 911 | 
| 77 | Marty Gifford/Bill Campbell | Williams Racing | Porsche 911 | 
| 79 | Art Riley/Arthur Mollin | Arthur Mollin | Volvo 122S | 
| 81 | Bill Pryor/Jose Marina | Anatholy Arutunoff | Alfa Romeo Giulia SS | 
| 83 | Jim Baker/Clive Baker/Paul Richards | Jim Baker | Austin-Healey Sprite | 
| 86 | Pete Harrison/Jack Ryan | RBM Motors | Porsche 911 | 
| 88 | Francis C.Grant/Dieter Oest/Barry Batchin | Francis C.Grant | Lancia Fulvia HF | 
| 89 | James Hall | LeVerne Hartje | Dodge Dart | 
| 91 | Norberto Mastandrea/Doug Silvers/Robin Ormes | Mar Shipping | Chevrolet Camaro | 
| 92 | Wilton T. Jowett Jr/Craig Fisher | Wilton T. Jowett Jr | Chevrolet Camaro | 
| 93 | Richard Cline/Michael Pickering | Richard Cline | Triumph GT6 | 
| 96 | Smokey Drolet/John Tremblay/Vince Gimondo/John Belperche | Zorian	Productions | Chevrolet Corvette | 
| 97 | Claudio Maglioli/Raffaele Pinto | Algar Enterprises | Lancia Fulvia HF Zagato | 
| 98 | Bruce Hollander/Robert Clark/Wayne Marsula | Algar Enterprises | Lancia Fulvia HF Zagato | 
| 99 | Richard Robson/Rajah Rodgers | Richard Robson | Jaguar XK-E |