| Teams 1968 Islip 300 |
|---|
| No. | Team | Driver | Mfg |
|---|---|---|---|
| 0 | Don Tarr | Frank Warren | Chevrolet |
| 1 | Dennis Holt | Paul Dean Holt | Ford |
| 2 | Donald Brackens | Bobby Allison | Chevrolet |
| 3 | Fox Racing | Buddy Baker | Dodge |
| 4 | DeWitt Racing | John Sears | Ford |
| 6 | Castle Racing | Neil Castles | Plymouth |
| 8 | Negre Racing | Ed Negre | Ford |
| 9 | Roy Tyner | Bill Vanderhoff | Chevrolet |
| 17 | Holman-Moody Racing | David Pearson | Ford |
| 20 | Clyde Lynn | Clyde Lynn | Ford |
| 25 | Robertson Racing | Jabe Thomas | Ford |
| 28 | Brooks Racing | Earl Brooks | Ford |
| 34 | Scott Racing | Wendell Scott | Ford |
| 43 | Petty Enterprises | Richard Petty | Plymouth |
| 44 | Giachetti Brothers Racing | John Winger | Ford |
| 45 | Siefert Racing | Bill Seifert | Ford |
| 48 | Hylton Engineering | James Hylton | Dodge |
| 49 | GC Spencer Racing | G.C. Spencer | Plymouth |
| 64 | Elmo Langley & Henry Woodfield | Elmo Langley | Ford |
| 69 | Ken Cline | David Mote | Chevrolet |
| 70 | McDuffie Racing | J.D. McDuffie | Buick |
| 71 | K&K Racing | Bobby Isaac | Dodge |
| 75 | Gene Black | Gene Black | Ford |
| 76 | Don Culpepper | Roy Tyner | Ford |
| 87 | Buck Baker Racing | Buck Baker | Chevrolet |