| Teams 1973 Winston Western 500 |
|---|
| No. | Team | Driver | Mfg |
|---|---|---|---|
| 1 | Carl Dane | Clem Proctor | Ford |
| 2 | Marcis Auto Racing | Dave Marcis | Dodge |
| 2 | Mike Ober | Dick Bown | Dodge |
| 3 | J.A. Delvecchio | John Soares, Jr. | Dodge |
| 3 | Bown Racing | Chuck Bown | Dodge |
| 4 | Beryl Jackson | Hershel McGriff | Plymouth |
| 7 | Ernie Conn | Jack McCoy | Dodge |
| 9 | Richard Mummert | Carl Adams | Ford |
| 10 | Champion Racing | Bill Champion | Ford |
| 11 | Howard & Egerton Racing | Cale Yarborough | Chevrolet |
| 12 | Bobby Allison Motorsports | Bobby Allison | Chevrolet |
| 15 | Bud Moore Engineering | Bobby Isaac | Ford |
| 16 | Team Penske | Mark Donohue | AMC Matador |
| 19 | Henley Gray Racing | Henley Gray | Mercury |
| 21 | Wood Brothers Racing | David Pearson | Mercury |
| 24 | Gordon Racing | Cecil Gordon | Chevrolet |
| 24 | Dean Barnicle | Richard White | Ford |
| 26 | Dean Thorne | Carl Joiner | Chevrolet |
| 30 | Vic Ballard | Walter Ballard | Plymouth |
| 33 | Trent Francis | Glenn Francis | Chevrolet |
| 38 | Roger Paquette | Jimmy Insolo | Chevrolet |
| 41 | Holman-Moody Racing | Bobby Unser | Ford |
| 43 | Petty Enterprises | Richard Petty | Dodge |
| 46 | Roger Bracken | John Hren | Chevrolet |
| 48 | Hylton Engineering | James Hylton | Mercury |
| 60 | Jim Whitt | Jim Whitt | Chevrolet |
| 64 | Langley Racing | Elmo Langley | Ford |
| 68 | Jerry Lankford | Sonny Easley | Ford |
| 70 | McDuffie Racing | J.D. McDuffie | Chevrolet |
| 71 | K&K Racing | Buddy Baker | Dodge |
| 72 | DeWitt Racing | Benny Parsons | Chevrolet |
| 77 | Roberts Racing | Charlie Roberts | Ford |
| 78 | Hugh Pearson | Hugh Pearson | Chevrolet |
| 84 | Nissen Racing | Jim Danielsen | Mercury |
| 91 | Don Nuzum | Johnny Anderson | Chevrolet |
| 95 | Paul Stockwell | Bob Kauf | Chevrolet |
| 96 | Elder Racing | Ray Elder | Dodge |
| 97 | Jefferson Racing | Harry Jefferson | Ford |