| 1 | Ford Mk II | Ford Motor Co. (Shelby American) | yellow (+black) | FORD | Goodyear | | closed | mid |
| 2 | Ford Mk II | Ford Motor Co. (Shelby American) | blue (+white) | FORD | Goodyear | | closed | mid |
| 3 | Ford Mk II | Ford Motor Co. (Shelby American) | red (+white) | FORD | Goodyear | | closed | mid |
| 4 | Ford Mk II | Ford Motor Co. (Holman & Moody) | gold (+black) | FORD | Goodyear | | closed | mid |
| 5 | Ford Mk II | Ford Motor Co. (Holman & Moody) | brown (+black) | FORD | | | closed | mid |
| 6 | Ford Mk II | Ford Motor Co. (Holman & Moody) | silver (+black) | | | | closed | mid |
| 7 | Shelby Cobra | Herb W. Byrne | blue | | | | open | front |
| 8 | Chevrolet Corvette Grand Sport | Jim White Chevrolet Inc. | white (+blue) | Jim White | Goodyear | | closed | front |
| 9 | Ford GT40 | Brescia Racing Corse | | | | | - | mid |
| 11 | Ford GT40 | J. W. Automotive (GD) | | FORD | | | closed | mid |
| 14 | Chaparral 2D Chevrolet | Chaparral Cars, Inc. | white | | | | closed | mid |
| 15 | Chaparral 2F Chevrolet | Chaparral Cars, Inc. | white | | | | closed | mid |
| 16 | Chevrolet Camaro | Joie Chitwood, Sr. | | | | | closed | front |
| 18 | Shelby GT350 | Roger West | white (+blue) | | | Valvoline | closed | front |
| 19 | Ford Falcon | Howmet Corp. | | | | | closed | front |
| 20 | Ford GT40 | William Wonder, Inc. | deep red | | | | - | mid |
| 21 | Dodge Dart | Brock Yates | red | DODGE DART/CAL AUTO TECH | Goodyear | | closed | - |
| 22 | Plymouth Barracuda | JoKar Racing Associates | | | | | - | - |
| 23 | Ferrari 330 P3/4 Spyder | Ferrari s.p.a. | red | | | | open | mid |
| 24 | Ferrari 330 P4 Coupé | Ferrari s.p.a. | red | | | | closed | mid |
| 26 | Ferrari 412 P | North American Racing Team | red | GOODYEAR | Goodyear | | closed | mid |
| 28 | Ferrari 365 P2 | North American Racing Team | white | | | | closed | mid |
| 29 | Ferrari 275 GTB/C | Pedro Rodriguez, Jr. | red | | Goodyear | | closed | front |
| 31 | Ferrari 365 P2/3 | David Piper | green | | | | open | mid |
| 32 | Ferrari 250 LM | Peter Clarke | green | | | | closed | mid |
| 33 | Ferrari 412 P | Ecurie Francorchamps | | | | | closed | mid |
| 34 | Ferrari Dino 206 S | Harrah Modern Classic Motors | | | | | - | - |
| 36 | Chevrolet Camaro | Roger Penske | | | | | closed | front |
| 40 | Chevrolet Camaro | Craig Fisher | | | | | closed | front |
| 42 | Triumph TR4A | Cannons Auto Service | white (+red) | | | | hardtop | front |
| 43 | Triumph TR4A | Cannons Auto Service | white | CANNONS | | | hardtop | front |
| 44 | Triumph TR4A | Raymond Stoutenburg | | | | | - | front |
| 45 | Triumph TR4 | Joe C. Hines, Jr. | | | | | - | front |
| 46 | Jaguar XKE | Richard B. Robson, Jr. | | | Firestone | | closed | front |
| 47 | Chevron B4 BMW | Fred Opert Racing | red/white (+blue) | VALVOLINE OILS | | Valvoline | closed | mid |
| 48 | Triumph TR4 | Tim Burr (Atlas Van Lines) | red/white | | | | hardtop | front |
| 51 | Porsche 906 E | Porsche of Stuttgart | white (+orange) | | Goodyear | | closed | mid |
| 52 | Porsche 910 | Porsche of Stuttgart | | | Dunlop | | closed | mid |
| 53 | Porsche 906 | Porsche of Stuttgart | | | | | closed | mid |
| 54 | Porsche 911 S | RBM Motors | | | | | - | rear |
| 55 | Porsche 906 LH | Squadra Tartaruga Switz. | | | | | closed | mid |
| 56 | Porsche 906 LH | Charles Vogele | | | | | closed | mid |
| 58 | Porsche 906 | Rod Savyer | red | VALVOLINE | Dunlop | Valvoline | closed | mid |
| 61 | Porsche 911 | George P. Drolsom | | | | | closed | rear |
| 63 | Shelby GT350 | Dockery Ford, Inc. | | | | | closed | front |
| 66 | Ford Mustang | Thomas D. Yaeger | | | | | closed | front |
| 67 | Shelby GT350 | Dos Caballos Racing, Inc. | | | | | closed | front |
| 71 | Ford Mustang | Ring Free Oil Racing Team | | | | | closed | front |
| 72 | Ford Mustang | Ring Free Oil Racing Team | | RING FREE OIL RACING TEAM | | | closed | front |
| 73 | Volvo P1800 | Dr. J. Peter Marinelli | | | | | closed | - |
| 74 | Volvo 122S | Arthur Mollin Racing Ent. | | | | | - | - |
| 75 | Volvo 122S | Dr. I. A. Maxwell, Jr. | | | | | - | - |
| 76 | Ford Mustang | John McComb | | | | | - | front |
| 77 | Alfa Romeo GTA | Precision Auto, Inc. | | | | | - | - |
| 82 | Alfa Romeo GTA | Harry Theodoracopulos | | | | | - | front |
| 84 | MGB GT | Richard N. Ganger | black (+white) | | | | closed | front |
| 85 | Alfa Romeo GTA | Jim Baker | | | | | - | - |
| 86 | MGB | Kenneth G. Chambliss | | | | | hardtop | front |
| 87 | Ford Cortina Lotus | Chet Freeman | | | | | - | - |
| 89 | Ford Cortina Lotus | Ross L. Bremer | | | | | closed | front |
| 90 | Alfa Romeo GTA | Del O. Taylor | | | | | - | front |
| 96 | ASA 411 | Jim Baker | | RING FREE OIL RACING TEAM | Goodyear | | closed | front |