| 0 | Elliott / McDill | Byron Cook Racing (USA) | | Chevrolet | Camaro | II | Chevrolet | TO |
| 00 | Diggett / Johnson | Levi's Team Highball (USA) | Amos Johnson | AMC | Gremlin | | AMC | TO |
| 1 | Keyser / Minter | Toad Hall Motor Racing (USA) | Michael Keyser | Porsche | 911 Carrera | RSR 2.8 | Porsche | GTO |
| 2 | Donley / Scott | Dean Donley | | MG | B | | BMC | GTU |
| 3 | Bauer / DeStefano / Engels | Performance Associates (USA) | | Chevrolet | Corvette | C3 | Chevrolet | GTO |
| 4 | Lillquist / *Webbe / *Merrick | Western Sizzlin' Steak Houses | | Porsche | 911 | S | Porsche | GTU |
| 5 | Heinz / Thompson / *English | Race Enterprise & Developments (USA) | | Chevrolet | Corvette | C3 | Chevrolet | GTO |
| 6 | Davidson / *Baechle | Alex Davidson | | Chevrolet | Corvette | C3 | Chevrolet | GTO |
| 7 | Johnson / Young | Eddie Johnson (USA) | | Chevrolet | Camaro | | Chevrolet | TO |
| 8 | Felton / *Nehl | Automotive Engineering (USA) | | Chevrolet | Camaro | II | Chevrolet | TO |
| 9 | Kessler / Fitzgerald | Ray Kessler Inc. | | Chevrolet | Camaro | | Chevrolet | TO |
| 11 | DeLorenzo / Durst / *Carter | Troy Promotions Inc. (USA) | Tony DeLorenzo | Chevrolet | Corvette | C3 | Chevrolet | GTO |
| 14 | Boykin / *Meldeau / *Canada | C. C. Canada (USA) | C. C. Canada | Chevrolet | Camaro | I | Chevrolet | TO |
| 15 | Kirby / Sherwin / Hotchkis | Johnson/Bozzani (USA) | Johnson/Bozzani | Porsche | 911 | S | Porsche | GTU |
| 17 | Gimondo / Dingman | Vince Gimondo (USA) | | Chevrolet | Camaro | II | Chevrolet | TO |
| 19 | Rodriguez / McClure / *Clark | U. S. Davis Racing | | Chevrolet | Camaro | | Chevrolet | TO |
| 21 | Posey / Cluxton | Grand Touring Cars Inc. | | Ferrari | 365 GTB/4 | | Ferrari | GTO |
| 22 | Overbagh / Freeman / Peters | Mark IV Racing | | Ford | Pinto | | Ford | TU |
| 23 | Lewis / Milledge / Sebba | Riley Racing (USA) | | De Tomaso | Mangusta | | Ford | GTO |
| 24 | Chitwood / Chitwood / Nagel | T. C. Racing (USA) | | Chevrolet | Camaro | | Chevrolet | TO |
| 25 | Buffum / Everett | Libra International Racing (USA) | John Buffum | Ford | Escort | I RS 1600 | Ford | TU |
| 26 | Cook / *Alexander / *Barrett | Wayne Alexander | | Chevrolet | Nova | | Chevrolet | TO |
| 27 | Lindley / Behr / Goellnicht / *Peters | Don Lindley | Don Lindley | Porsche | 911 | ST | Porsche | GTU |
| 28 | Fleming / *Corwin | Ed Fleming | | Chevrolet | Camaro | | Chevrolet | TO |
| 29 | Noseda / Mummery / Small | Ralph M. Noseda (USA) | | Chevrolet | Camaro | | Chevrolet | TO |
| 30 | Dallmeyer / Dunn | Dallmeyer Racing | | Chevrolet | Camaro | | Chevrolet | TO |
| 32 | Boza / Hernandez / Romero | Roberto Auto Electric | | Shelby | GT500 | | | GTO |
| 33 | Davis / Melville / Beatty | RaceCo of Coral Gables | | Alfa Romeo | GTV | | Alfa Romeo | TU |
| 34 | Knupp / Tullius / *Murray | Murray Racing Team (USA) | | Chevrolet | Corvette | C3 | Chevrolet | GTO |
| 37 | Moore / McCullough | Dan Moore (USA) | Dan Moore | Ford | Mustang | | Ford | TO |
| 40 | Nell / Dagiel / Pirrotta | Pironell Racing (USA) | | Chevrolet | Corvette | C3 | Chevrolet | GTO |
| 41 | Garcia / Shinn | George Garcia Racing (USA) | | Chevrolet | Corvette | C3 | Chevrolet | GTO |
| 42 | Sereix / Lilly / Yoder | Garcia Racing (USA) | Jose Garcia | Chevrolet | Camaro | II | Chevrolet | TO |
| 44 | Garcia / *Vilarchao / *Nunez | Larrauri Racing (USA) | | Chevrolet | Nova | | Chevrolet | TO |
| 46 | Bytzek / Bartling | Bytzek Automotive (CDN) | | Porsche | 911 | S | Porsche | GTU |
| 47 | Keller / Gray / Potter | Sebring Racing Inc. (USA) | | Chevrolet | Corvette | C3 | Chevrolet | GTO |
| 48 | Greenwood / Yenko | John Greenwood Racing (USA) | | Chevrolet | Corvette | | Chevrolet | GTO |
| 49 | Greendyke / Johnson | John Greenwood Racing (USA) | | Chevrolet | Corvette | C3 | Chevrolet | GTO |
| 50 | Grable / Greenwood / Brockman | John Greenwood Racing (USA) | | Chevrolet | Corvette | C3 | Chevrolet | GTO |
| 54 | Schumacher / Hay | Iroquois Racing (USA) | | Chevrolet | Corvette | C3 | Chevrolet | GTO |
| 57 | Garcia / Almeida / *Buckley / *Febles | Garcia Racing | | Ford | Mustang | | Ford | TO |
| 59 | Gregg / Haywood / Helmick | Dr. Dave Helmick (USA) | | Porsche | 911 Carrera | RSR | Porsche | GTO |
| 61 | Chapman / McLaren / Hood | Sebring Racing Inc. | | Chevrolet | Corvette | C2 | Chevrolet | GTO |
| 62 | Stevens / Sherman / *Peters | Jeff Stevens Racing (USA) | | Chevrolet | Corvette | C3 | Chevrolet | GTO |
| 64 | Harrison / Buchler | Peter Harrison (USA) | | Ferrari | Dino 246 GT | | Ferrari | GTU |
| 65 | Cutler / Kirill | Lee Cutler | | Porsche | 914 | /6 | Porsche | GTU |
| 67 | McClain / White / *Floyd | David H. McClain (USA) | | Porsche | 914 | /6 | Porsche | GTU |
| 69 | Goldleaf / Tunstall | WGB Niagara Wines | | Chevrolet | Corvette | | Chevrolet | GTO |
| 70 | Dancose / *Bienvenue | Marc Dancose (CDN) | Marc Dancose | Porsche | 911 | ST | Porsche | GTU |
| 71 | Christiansen / Myers / Tremblay | Robert Christiansen (USA) | | Chevrolet | Camaro | | Chevrolet | TO |
| 72 | Naon / Garcia / Freyre | Alberto Naon | | Chevrolet | Camaro | I | Chevrolet | TO |
| 74 | Groleau / Ross / Shaw | J. G. Racing | | Datsun | 240Z | | Datsun | GTU |
| 75 | Kuenz / *Shelton | Tom Kuenz (USA) | | Porsche | 911 | S | Porsche | GTU |
| 76 | Stone / Downs | Silverstone Racing Team (USA) | George Stone | Porsche | 911 | ST | Porsche | GTU |
| 77 | Jennings / Beasley | Bruce Jennings (USA) | Bruce Jennings | Porsche | 911 | S | Porsche | GTU |
| 78 | Quintana / Almeida | Manuel Quintana | | Ford | Mustang | | Ford | TO |
| 80 | Stumpff / Vreeland / Pirie | J. Kirby Stumpff | | Shelby | GT500 | | Ford | GTO |
| 81 | Egerton / Forbes-Robinson | Far West Racing (USA) | Grey Egerton | Porsche | 911 Carrera | RSR 2.8 | Porsche | GTO |
| 82 | Bergstrom / Cook | Bob Bergstrom (USA) | Bob Bergstrom | Porsche | 911 | S | Porsche | GTU |
| 83 | Gafford / Belperche / *Smith | Houghton Smith | | Chevrolet | Camaro | | Chevrolet | TO |
| 84 | Selbert / Glage | Airport Motorsports | | Porsche | 911 | S | Porsche | GTU |
| 85 | Parish / Jones / Hulen | Donald Parish (USA) | | Porsche | 914 | /6 | Porsche | GTU |
| 86 | Lynch / Milne | James Lynch (USA) | | Porsche | 911 | ST | Porsche | GTU |
| 87 | Miller / Henry | Miller/Hey (USA) | | Ford | Mustang | | Ford | TO |
| 88 | Lapp / Meldeau | Bob Lapp | | Datsun | 240Z | | Datsun | GTU |
| 89 | Parish / Causey / Taylor | Thomas Barrick (USA) | | Porsche | 911 | S | Porsche | GTU |
| 90 | Walle / Schuck | Z & W Mazda | | Mazda | RX-2 | | Mazda | TU |
| 91 | Oest / Tillson / Bytzek | Holbert's Porsche-Audi (USA) | | Porsche | 911 | S | Porsche | GTU |
| 92 | Oest / Heth / Olimpi / *Tillson | Holbert's Porsche-Audi (USA) | | Porsche | 911 | S | Porsche | GTU |
| 94 | Pickett / Bean | Leldon Blackwell (USA) | | Chevrolet | Corvette | C3 | Chevrolet | GTO |
| 95 | Dickinson / Wachs / Pultz | G. W. Dickinson | | Porsche | 911 | | Porsche | GTU |
| 97 | Ansley / Connelly / Avera | Ansley Racing Enterprises (USA) | | Chevrolet | Corvette | | Chevrolet | GTO |
| 98 | Pearson / Spencer / Taylor | Loren Ross | | Shelby | GT500 | | Ford | GTO |
| 99 | Currin / Fortin / Johnson | Phil Currin (USA) | | Chevrolet | Corvette | C2 | Chevrolet | GTO |
| 110 | Mitchell / Williams / *Houser | Bolus & Snopes | | Dodge | Colt | | Dodge | TU |
| 111 | Swanson / West | Jeffrey Brooks | | Austin | America | | BMC | TU |
| 114 | Grob / Montalvo | Jim Grob Racing | | BMW | 2002 | | BMW | TU |
| 138 | Fleming / Mandeville | PDF Racing (USA) | | Mazda | RX-2 | | Mazda | TU |
| 168 | Whitaker / Vance / Hughes | Whitaker/Vance | | Volvo | 122 | S | Volvo | TU |
| 169 | Coleman / Shaw | Performance Engineering (USA) | | Opel | Manta | A | Opel | TU |
| 175 | Baldwin / Clark | U.S. Davis Racing | | Datsun | 510 | | Datsun | TU |
| 176 | Oliva / Polimeni | Laurence Oliva | | Volvo | 122 | S | Volvo | TU |
| 188 | Wolin / Cohen | Dave Wolin (USA) | | Ford | Pinto | | Ford | TU |