| Teams for 1966 Firecracker 400 |
|---|
| Car | Team | Driver | Mfg |
|---|---|---|---|
| 3 | Fox Racing | Buddy Baker |  |
| 4 | DeWitt Racing | John Sears |  |
| 04 | Friedkin Enterprises | Marvin Panch |  |
| 5 | Owens Racing | Mario Andretti | |
| 6 | Owens Racing | David Pearson | |
| 14 | Friedkin Enterprises | Jim Paschal | |
| 16 | Bud Moore Engineering | Darel Dieringer |  |
| 25 | Handy Racing | Jabe Thomas | |
| 31 | Nichels Engineering | Don White | |
| 34 | Scott Racing | Wendell Scott | |
| 38 | Archy Smith | Wayne Smith |  |
| 43 | Petty Enterprises | Richard Petty | |
| 49 | GC Spencer Racing | G.C. Spencer | |
| 67 | Arrington Racing | Buddy Arrington | |
| 70 | McDuffie Racing | J.D. McDuffie | |
| 71 | K&K Racing | Earl Balmer | |
| 86 | Buck Baker Racing | Buck Baker | |
| 97 | Henley Gray Racing | Henley Gray | |
| 98 | Nichels Engineering | Sam McQuagg | |
| 99 | Nichels Engineering | Paul Goldsmith | |
