| 1 | Cunningham / Fitch / *Hugus | Jaguar Distributors of New York (USA) | Briggs Cunningham | Chevrolet | Corvette | C1 | Chevrolet | GT5.0 |
| 2 | Thompson / Windridge / *Forno | Jaguar Distributors of New York (USA) | Briggs Cunningham | Chevrolet | Corvette | C1 | Chevrolet | GT5.0 |
| 3 | Gamble / Jeffords / Wuesthoff | Camoradi USA (USA) | | Chevrolet | Corvette | C1 | Chevrolet | GT5.0 |
| 4 | Jeffords / Gamble | Camoradi USA (USA) | | Chevrolet | Corvette | C1 | Chevrolet | GT5.0 |
| 5 | Johnson / Morgan | Johnson Chevrolet Co. (USA) | | Chevrolet | Corvette | C1 | Chevrolet | GT5.0 |
| 6 | Fritts / Hall | RRR Motors (USA) | | Chevrolet | Corvette | C1 | Chevrolet | GT5.0 |
| 7 | Daigh / Ginther | North American Racing Team (USA) | Luigi Chinetti | Ferrari | 250 TR | Fantuzzi Spyder 59/60 | Ferrari | S3.0 |
| 8 | Lovely / Nethercutt | Jack Nethercutt (USA) | Jack Nethercutt | Ferrari | 250 TR | Fantuzzi Spyder 59 | Ferrari | S3.0 |
| 10 | Hugus / Pabst | North American Racing Team (USA) | Charles Kreisler | Ferrari | 250 GT | SWB Berlinetta | Ferrari | S3.0 |
| 11 | Arents / Kimberly | North American Racing Team (USA) | Luigi Chinetti | Ferrari | 250 GT | SWB Berlinetta | Ferrari | S3.0 |
| 12 | Sturgis / D'Orey | William Sturgis (USA) | William Sturgis | Ferrari | 250 GT | SWB Berlinetta Competizione | Ferrari | S3.0 |
| 14 | Publicker / Constantine / McCarthy | Robert Publicker (USA) | | Ferrari | 250 GT | LWB California | Ferrari | S3.0 |
| 15 | Balzarini / Abate | Scuderia Serenissima (I) | Carlo Mario Abate | Ferrari | 250 GT | LWB Berlinetta Scaglietti TdF | Ferrari | GT3.0 |
| 16 | Abate / Scarlatti / Serena | Scuderia Serenissima (I) | Count Giovanni Volpi | Ferrari | 250 GT | LWB California | Ferrari | GT3.0 |
| 17 | Reed / Connell | RRR Motors (USA) | | Ferrari | 250 GT | LWB California | Ferrari | S3.0 |
| 18 | Riley / Sears | British Motor Corp. (USA) | | Austin-Healey | 3000 | | BMC | GT3.0 |
| 19 | Colgate / Spross / *Stiles | British Motor Corp. (USA) | | Austin-Healey | 3000 | | BMC | GT3.0 |
| 20 | Geitner / Spencer | British Motor Corp. (USA) | | Austin-Healey | 3000 | | BMC | GT3.0 |
| 21 | Moss / *Gurney | Camoradi USA (USA) | Lloyd Casner | Maserati | Tipo 61 | | Maserati | S3.0 |
| 22 | Shelby / Gregory | Camoradi USA (USA) | | Maserati | Tipo 61 | | Maserati | S3.0 |
| 23 | Moss / Gurney | Camoradi USA (USA) | Lloyd Casner | Maserati | Tipo 61 | | Maserati | S3.0 |
| 24 | Stear / Causey | Dave Causey (USA) | Dave Causey | Maserati | Tipo 61 | | Maserati | S3.0 |
| 25 | Hansgen / Crawford | Jaguar Distributors of New York (USA) | | Maserati | Tipo 61 | | Maserati | S3.0 |
| 26 | Black / Tower | Charlemagne Tower (USA) | Duncan Black | Daimler | SP250 | | Daimler | S3.0 |
| 27 | Sharp / Hall / *Hissom | Hap Sharp (USA) | Hap Sharp | Cooper | Monaco | T49 | Maserati | S2.0 |
| 28 | Rodriguez / Rodriguez | North American Racing Team (USA) | | Ferrari | Dino 196 S | | Ferrari | S2.0 |
| 30 | Williamson / Forno / *Allen | Morgan Motors Ltd. (USA) | | Morgan | Plus 4 | | | GT2.0 |
| 31 | Goldman / Durbin | S. H. Arnolt Inc. (USA) | | Arnolt-Bristol | Bolide | | Bristol | GT2.0 |
| 32 | Payne / Gary | S. H. Arnolt Inc. (USA) | | Arnolt-Bristol | Bolide | | Bristol | GT2.0 |
| 33 | Johnston / Seaverns / Bradley | S. H. Arnolt Inc. (USA) | | Arnolt-Bristol | Bolide | | Bristol | GT2.0 |
| 34 | Grossman / Rothschild / *Keyes | A.C. Cars Ltd. (GB) | | AC | Ace | | Bristol | GT2.0 |
| 35 | Mazzi / Schroeder / *Kopenhauer | A.C. Cars Ltd. (GB) | Robert Mazzi | AC | Ace | | Bristol | GT2.0 |
| 36 | Hulsey / Washburn | A.C. Cars Ltd. (GB) | | AC | Ace | | Bristol | GT2.0 |
| 37 | Masterson / Patterson / Babcock | Elva Distributors USA (USA) | | Elva | Courier | | Climax | S1.6 |
| 38 | Escott / Lund | British Motor Corp. (USA) | | MG | A | Twin Cam | BMC | GT1.6 |
| 39 | Hayes / Leavens | British Motor Corp. (USA) | | MG | A | Twin Cam | BMC | GT1.6 |
| 40 | Flaherty / Parkinson | British Motor Corp. (USA) | | MG | A | Twin Cam | BMC | GT1.6 |
| 41 | Cuevas / Norinder / *Ringling | Quiver Enterprises (USA) | | Porsche | 356 | A 1600 GS Carrera GT Speedster | Porsche | GT1.6 |
| 42 | Herrmann / Gendebien / *Bonnier | Joakim Bonnier (S) | | Porsche | 718 | RS 60 | Porsche | S1.6 |
| 43 | Hill / Bonnier / *Gendebien | Joakim Bonnier (S) | | Porsche | 718 | RS 60 | Porsche | S1.6 |
| 44 | Holbert / Schecter / Fowler | Brumos Porsche Car Corp. (USA) | | Porsche | 718 | RS 60 | Porsche | S1.6 |
| 45 | Erickson / Sesslar | Carl Erickson Co. (USA) | | Porsche | 718 | RSK | Porsche | S1.6 |
| 46 | von Döry / Mières / von Döry | Anton von Dory (RA) | | Porsche | 718 | RSK | Porsche | S1.6 |
| 47 | Koehne / Makins | Automobili Osca USA (USA) | | Osca | MT4 | 1500 | Osca | S1.6 |
| 48 | Milliken / Argetsinger | Cameron Argetsinger (USA) | | Alfa Romeo | Giulietta Spider Veloce | | Alfa Romeo | GT1.3 |
| 49 | Rainville / Kaplan | Jake Kaplan (USA) | | Alfa Romeo | Giulietta Veloce | | Alfa Romeo | GT1.3 |
| 50 | O'Brien / Horn | Louis Comito (USA) | | Alfa Romeo | Giulietta Spider Veloce | | Alfa Romeo | GT1.3 |
| 51 | Comito / Durant / Richardson | Ross Durant, Jr. (USA) | | Alfa Romeo | Giulietta Spider Veloce | | Alfa Romeo | GT1.3 |
| 52 | Kessinger / McClellan, Jr. / Gardner | Dr. Ray Martinez (USA) | | Alfa Romeo | Giulietta Veloce | | Alfa Romeo | GT1.3 |
| 53 | Troiano / Swanson / Waltman | Racing Associates of New England (USA) | | Alfa Romeo | Giulietta Sprint Veloce | | Alfa Romeo | GT1.3 |
| 54 | Van Beuren / Velasquez / Velazquez | Frederico van Beuren (MEX) | | Alfa Romeo | Giulietta Veloce | | Alfa Romeo | GT1.3 |
| 55 | Evans / Weiss / Chamberlain | Lotus Cars USA (USA) | Jay Chamberlain | Lotus | Elite | | Climax | GT1.3 |
| 56 | Hughes / Weiss | Lotus Cars USA (USA) | Jay Chamberlain | Lotus | Elite | | Climax | GT1.3 |
| 57 | Bott / Forno | Lotus Cars USA (USA) | Jay Chamberlain | Lotus | Elite | | Climax | GT1.3 |
| 58 | Vögele / Ashdown / *Roth | Charles Vogele (CH) | | Lola | Mk.1 | | Climax | S1.15 |
| 60 | Costley / Harrison | Edgar M. Costley (USA) | | Elva | Mk IV | | Climax | S1.15 |
| 61 | Sprintzel / Lumkin / *Moss | Donald Healey, Ltd. (GB) | | Austin-Healey | Sebring Sprite | Falcon | BMC | S1.0 |
| 63 | Bentley / Gordon | Automobili Osca USA (I) | John Gordon | Osca | S | 750 | Osca | S850 |
| 64 | McCluggage / Windridge | Camoradi USA (USA) | Lucky Casner | Osca | S | 750 | Osca | S850 |
| 65 | Cunningham / Fulp | Luigi Chinetti Motors (USA) | Luigi Chinetti | Osca | S | 750 | Osca | S850 |
| 66 | Cuomo / Richards | Roosevelt Automobiles (USA) | | Fiat-Abarth | 750 S | | Fiat | S850 |
| 67 | Lukens / Haynes / *Penn | Racemasters (USA) | | Bandini | GT | | Fiat | S850 |
| 68 | Wallace / Horton / Kolb | Elva Distributors USA (USA) | Dick Pellicano | Elva | Courier | | Ford | S1.6 |
| 72 | Dungan / Sheppard | Camoradi USA | | Porsche | 356 | A 1500 GS Carrera | Porsche | GT1.6 |
| 73 | Grimes / Hill | Elva Distributors USA (USA) | | Elva | Mk IV | | Climax | S1.15 |
| 75 | Linton / Ginther | John Miles (USA) | | Osca | S | 750 | Osca | S850 |
| 77 | O'Sullivan / Procter / Stevens | Tony O'Sullivan | | AC | Ace | | Bristol | GT2.0 |
| 79 | Siegel / Fry | London Motors Inc. | | Austin-Healey | 3000 | | BMC | GT3.0 |
| 80 | Bootz / de Beaufort | Count Karel de Beaufort | | Porsche | 356 | A 1600 GS Carrera | Porsche | GT1.6 |
| 81 | Gandolfi / *York / *O'Shea | Lewis Engineering Co. | | Mercedes-Benz | 300 SL | | Mercedes-Benz | GT3.0 |
| T2 | Riley / Sears / Colgate / Spross | British Motor Corp. (USA) | | Austin-Healey | 3000 | | BMC | GT3.0 |
| T | | British Motor Corp. | | MG | A | Twin Cam | BMC | GT1.6 |
| | Lotus Cars USA (USA) | Jay Chamberlain | Lotus | Elite | | Climax | GT1.3 |