| Teams 1966 Firecracker 400 |
|---|
| No. | Team | Driver | Mfg |
|---|---|---|---|
| 0 | Emory Gilliam | Roy Mayne | Dodge |
| 2 | Donald Brackens | Bobby Allison | Chevrolet |
| 2 | Bob Cooper | Doug Cooper | Plymouth |
| 3 | Fox Racing | Buddy Baker | Dodge |
| 4 | DeWitt Racing | John Sears | Ford |
| 4 | Friedkin Enterprises | Marvin Panch | Plymouth |
| 5 | Owens Racing | Mario Andretti | Dodge |
| 6 | John McCarthy | Jack Lawrence | Mercury |
| 6 | Owens Racing | David Pearson | Dodge |
| 7 | Shorty Johns | Bobby Johns | Chevrolet |
| 12 | Jon Thorne | LeeRoy Yarbrough | Dodge |
| 13 | Smokey Yunick | Curtis Turner | Chevrolet |
| 14 | Friedkin Enterprises | Jim Paschal | Plymouth |
| 16 | Bud Moore Engineering | Darel Dieringer | Mercury |
| 19 | J.T. Putney | J.T. Putney | Chevrolet |
| 24 | Betty Lilly | Tiny Lund | Ford |
| 25 | Handy Racing | Jabe Thomas | Ford |
| 31 | Nichels Engineering | Don White | Dodge |
| 33 | Curtis Satterfield | Joel Davis | Chevrolet |
| 34 | Scott Racing | Wendell Scott | Ford |
| 38 | Archie Smith | Wayne Smith | Chevrolet |
| 39 | J.H. Crawford | Bunkie Blackburn | Chevrolet |
| 43 | Petty Enterprises | Richard Petty | Plymouth |
| 44 | Larry Hess | Larry Hess | Ford |
| 48 | Bud Hartje | James Hylton | Dodge |
| 49 | GC Spencer Racing | G.C. Spencer | Plymouth |
| 53 | David Warren | Jimmy Helms | Ford |
| 55 | Lyle Stelter | Harold Smith | Ford |
| 56 | Norm Nelson | Jim Hurtubise | Plymouth |
| 64 | Elmo Langley & Henry Woodfield | Elmo Langley | Ford |
| 67 | Arrington Racing | Buddy Arrington | Dodge |
| 70 | McDuffie Racing | J.D. McDuffie | Ford |
| 71 | K&K Racing | Earl Balmer | Dodge |
| 79 | Harold Rhodes | Frank Warren | Chevrolet |
| 86 | Buck Baker Racing | Buck Baker | Chevrolet |
| 89 | Buck Baker Racing | Eddie MacDonald | Chevrolet |
| 93 | Harry Neal | Blackie Watt | Ford |
| 97 | Henley Gray Racing | Henley Gray | Ford |
| 98 | Nichels Engineering | Sam McQuagg | Dodge |
| 99 | Nichels Engineering | Paul Goldsmith | Plymouth |