| 1 | Porsche 917 K | J. W. Automotive Engineering Ltd. | light blue (+orange) | Gulf | Firestone | Gulf | closed | mid |
| 2 | Porsche 917 K | J. W. Automotive Engineering Ltd. | light blue (+orange) | Gulf | | Gulf | closed | mid |
| 3 | Porsche 917 K | Martini & Rossi Racing | silver/blue (+red) | MARTINI & ROSI RACING TEAM/Shell | Firestone | Shell | closed | mid |
| 5 | Porsche 914/6 | Jacques Duval | yellow | SUNOCO PORSCHE | | | hardtop | mid |
| 6 | Ferrari 512 M | Penske/White Racing | blue (+yellow/silver) | SUNOCO/Ferrari | Goodyear | Sunoco | closed | mid |
| 7 | Shelby Cobra | Blessing Racing, Inc. | dark blue (+white) | | Goodyear | | open | front |
| 9 | Chevrolet Corvette | Simone N. Fleming | blue | | | | - | front |
| 11 | Chevrolet Corvette | Troy Promotions, Inc. | white (+red/blue) | MARATHON | | | closed | front |
| 12 | Chevrolet Corvette | Troy Promotions, Inc. | red/white | | | | closed | front |
| 14 | Chevrolet Camaro | Boykin Auto Repair | white/blue | | | | closed | front |
| 15 | Porsche 911 S | Toad Hall Racing | yellow | Gulf | | | closed | rear |
| 16 | Chevron B16 Ford | Ring-Free Oil Racing Team | orange | | | | closed | mid |
| 17 | Chevron B16 Ford | Ring-Free Oil Racing Team | orange | | | | closed | mid |
| 18 | Chevron B16 Ford | Ring-Free Oil Racing Team | orange | | | | closed | mid |
| 19 | Chevrolet Camaro | Thomas T. Ciccone, Jr. | white/black | | | | closed | front |
| 20 | Ferrari 512 M | Young American Racing Team | red (+gold) | VALVOLINE/Shell | Goodyear | Shell/Valvoline | closed | mid |
| 21 | Ferrari 312 P/71 | North American Racing Team | red | GOODYEAR | Goodyear | Shell | open | mid |
| 22 | Ferrari 512 M | North American Racing Team | red | Shell/PA A | Goodyear | Shell | closed | mid |
| 23 | Ferrari 512 S | North American Racing Team | red | | Goodyear | | open | mid |
| 24 | Ferrari 365 GTB/4 | North American Racing Team | red | Pepsi Cola | | | closed | front |
| 25 | Ferrari 312 PB | Ferrari Automobili | red | HEUER/CARELLO | Firestone | Shell | open | mid |
| 26 | Ferrari 512 S | North American Racing Team | red | Shell/SILICONES | Goodyear | Shell | open | mid |
| 28 | Porsche 914/6 | Ralph Meaney, Inc. | green | | | | - | mid |
| 29 | Porsche 914/6 | Ralph Meaney, Inc. | green | VALVOLINE/PORSCHE | | Valvoline | hardtop | mid |
| 31 | Porsche 911 T | Locke Lake Colony & Waterville Estates | red | Gulf | | | closed | rear |
| 32 | Alfa Romeo T33/3 | Autodelta S.p.a. | red (+yellow) | Shell/CARELLO | | Shell | open | mid |
| 33 | Alfa Romeo T33/3 | Autodelta S.p.a. | red | Firestone | Firestone | Shell | open | mid |
| 34 | Alfa Romeo T33/3 | Autodelta S.p.a. | red (+white) | Firestone/BOSCH/Shell | Firestone | Shell | open | mid |
| 35 | Chevrolet Camaro | Collins-Wilson Racing Ent. | white | | | | closed | front |
| 38 | Shelby GT500 | John P. Belperche | red | | | | - | front |
| 39 | Porsche 911 S | K&T Enterprises | blue | Gulf/CIBIÉ | Goodyear | | closed | rear |
| 40 | Porsche 911 S | Bozzani Porsche, Inc. | red | | | | - | rear |
| 42 | Chevrolet Camaro II | Garcia Racing | blue/white | ... BODY SHOP | | | closed | front |
| 43 | Chevrolet Chevy II | Garcia Racing | blue/white | | | | - | - |
| 45 | Ford Mustang | Reventlow-Pettey Automobiles | white (+black) | | | Gulf | closed | front |
| 46 | Ford Mustang | Sebring Racing, Inc. | orange | | | | - | front |
| 47 | Chevrolet Camaro | Bruce Behrens Racing | red/gold | | | | closed | front |
| 48 | Chevrolet Corvette | John Greenwood | red/white/blue | MARATHON/GREENWOOD | Goodyear | | hardtop | front |
| 50 | Chevrolet Corvette | John Greenwood | red/white/blue | | | | closed | front |
| 51 | MGB | Waldron Motors Racing Team | dark green (+yellow) | | | | closed | front |
| 52 | MGB | Waldron Motors Racing Team | green | | | | - | front |
| 53 | Ford Cortina Lotus | Marion E. Dickson | green | | | | closed | front |
| 54 | Abarth 2000 SP (SE010) | Automobiles of Italy, Inc. | red (+white/green) | AUTOMOBILES OF ITALY/STP | | | open | mid |
| 55 | Datsun 510 | Clearwater Datsun | white (+blue/red) | | | | closed | front |
| 56 | Porsche 907 | Josef Greger | light blue | | | | - | mid |
| 57 | Chevrolet Corvette | Dave Heinz Racing, Inc. | yellow (+red) | CITY CORVETTE CLUB/DAVE HEINZ IMPORTS | Goodyear | Gulf | hardtop | front |
| 58 | Porsche 906 | Nationwide Food Brokers Racing Team | blue | Gulf/CIBIÉ | | Valvoline/Gulf | closed | mid |
| 59 | Porsche 914/6 | Brumos Porsche Audi Corp. | orange | | | | - | mid |
| 60 | Porsche 911 S | Wheel Sport, Ent. | white | | | | closed | rear |
| 61 | Lola T210 Ford | Promotional Advertising Corp. | yellow | Sea View/PIPER/Gulf/VALVOLINE | Goodyear | Valvoline | open | mid |
| 63 | Chevrolet Camaro I | Preston Hood Chevrolet | white/red (+blue) | Preston Hood CHEVROLET | Firestone | | closed | front |
| 64 | Chevrolet Corvette | Bob Baechle | gold | | | | - | front |
| 66 | Chevrolet Camaro I | Performance Automobile | blue | Gulf | | Gulf | closed | front |
| 69 | Ford Escort | Triton Racing | orange/black | | | | closed | front |
| 71 | Chevrolet Camaro II | Takondo Racing | maroon/white | | Goodyear | | closed | front |
| 72 | Chevrolet Camaro | Robert R. Mitchell | orange | | | | closed | front |
| 74 | Porsche 906 | Dr. Mervin B. Rosen | white | | | | closed | mid |
| 78 | Volvo 122 S | George W. Sanderson (Sandy's Spares) | white | GLOBE Foreign Auto Parts Westchester | | | closed | front |
| 80 | Datsun 510 | John T. M. Baldwin | yellow | | | | closed | front |
| 81 | Porsche 911 S | Ray Walle Ent. Inc. | black/orange | Gulf/WESTCLOX | | | closed | rear |
| 83 | BMW 2002 | German Motors, Inc. & Chem Air Spray, Inc. | tan | | | | closed | front |
| 84 | Alfa Romeo GTV | Del Taylor | black/orange | | | | closed | front |
| 86 | Chevrolet Corvette | Cliff Gottlob | white | | | | - | front |
| 88 | Chevrolet Camaro I | S-Car-Go-Racing | black | Gulf | | Gulf | closed | front |
| 89 | Chevrolet Camaro | H. Houghton Smith | blue/white | | | | closed | front |
| 92 | Chevrolet Camaro | B. F. Goodrich Tire Co. | blue | | BF Goodrich | | closed | front |
| T | Porsche 917 K | J. W. Automotive Engineering Ltd. | | | | Gulf | closed | mid |