| Official Race Results | |||||||||
| Mason-Dixon 500 | Dover Downs International Speedway | |||||||||
| May 15, 1977 | Race 12 of 30 | |||||||||
| Average Speed: 123.327 mph | |||||||||
| Margin of Victory: 6.2 seconds | Time of Race: 04:03:15 | ||||||||
| Lead Changes: 11 | |||||||||
| Cautions: 2 for 10 laps. | |||||||||
| Fin | St | Car | Driver | Make | Sponsor | Pts / Bonus | Laps | Status | Winnings |
| 1 | 6 | #11 | Cale Yarborough | Chevrolet | Holly Farms | 180/5 | 500 | Running | $15,400 |
| 2 | 4 | #21 | David Pearson | Mercury | Purolator | 180/10 | 500 | Running | $8,000 |
| 3 | 1 | #43 | Richard Petty | Dodge | STP | 170/5 | 499 | Running | $8,600 |
| 4 | 3 | #88 | Darrell Waltrip | Chevrolet | Gatorade | 165/5 | 496 | Running | $6,700 |
| 5 | 8 | #90 | Dick Brooks | Ford | Truxmore | 155/0 | 496 | Running | $5,250 |
| 6 | 2 | #72 | Benny Parsons | Chevrolet | 1st Nat'l City Trav. Cks. | 155/5 | 495 | Running | $5,750 |
| 7 | 11 | #54 | Lennie Pond | Chevrolet | Elder Racing | 146/0 | 494 | Running | $4,000 |
| 8 | 5 | #12 | Bobby Allison | Matador | 1st Nat'l City Trav. Cks. | 142/0 | 493 | Running | $3,280 |
| 9 | 7 | #15 | Buddy Baker | Ford | Norris | 138/0 | 490 | Running | $5,000 |
| 10 | 10 | #84 | Morgan Shepherd | Mercury | Ridge Plumbing | 134/0 | 486 | Running | $1,700 |
| 11 | 24 | #67 | Buddy Arrington | Dodge | Hickory Garage | 130/0 | 482 | Running | $3,120 |
| 12 | 25 | #24 | Cecil Gordon | Chevrolet | Transmissions Unlimited | 127/0 | 480 | Running | $2,960 |
| 13 | 12 | #70 | J.D. McDuffie | Chevrolet | McDuffie Racing | 124/0 | 480 | Running | $2,865 |
| 14 | 15 | #30 | Tighe Scott | Chevrolet | Scotty's Fashions | 121/0 | 479 | Running | $2,605 |
| 15 | 26 | #8 | Ed Negre | Dodge | Jones | 118/0 | 475 | Running | $2,395 |
| 16 | 21 | #57 | Dick May | Ford | McClure Motors | 115/0 | 473 | Running | $1,200 |
| 17 | 9 | #92 | Skip Manning | Chevrolet | 1st Nat'l City Trav. Cks. | 112/0 | 469 | Running | $2,135 |
| 18 | 23 | #64 | Tommy Gale | Ford | Sunny King Ford | 109/0 | 454 | Running | $1,900 |
| 19 | 33 | #25 | Ferrel Harris | Chevrolet | Thomas | 106/0 | 449 | Running | $1,640 |
| 20 | 18 | #40 | D.k. Ulrich | Chevrolet | Lafayette Radio | 103/0 | 407 | Running | $1,530 |
| 21 | 19 | #3 | Richard Childress | Chevrolet | Kansas Jack | 100/0 | 389 | Water Pump | $1,420 |
| 22 | 30 | #4 | Gary Myers | Chevrolet | Hick's Pharmacy | 97/0 | 371 | Steering | $775 |
| 23 | 28 | #01 | Earle Canavan | Dodge | Canavan Racing | 94/0 | 313 | Transmission | $1,200 |
| 24 | 32 | #45 | Baxter Price | Chevrolet | Price Racing | 91/0 | 303 | Overheating | $1,200 |
| 25 | 34 | #33 | Earl Brooks | Chevrolet | Smith Auto Parts | 88/0 | 274 | Blown Head Gasket | $675 |
| 26 | 22 | #79 | Frank Warren | Dodge | Native Tan | 85/0 | 247 | Engine Failure | $1,250 |
| 27 | 20 | #22 | Ricky Rudd * | Chevrolet | Al Rudd Auto Parts | 82/0 | 190 | Broken Oil Pump | $625 |
| 28 | 29 | #20 | Rick Newsom | Ford | Gillespie Painting | 79/0 | 176 | Broken Valve | $600 |
| 29 | 14 | #52 | Jimmy Means | Chevrolet | Means Racing | 76/0 | 139 | Broken Piston | $650 |
| 30 | 16 | #16 | Dave Sisco | Chevrolet | Bel Air Datsun | 73/0 | 126 | Broken Oil Pump | $1,050 |
| 31 | 36 | #95 | Elmo Langley | Chevrolet | Miller Roofing | 70/0 | 119 | Cracked Oil Pan | $540 |
| 32 | 31 | #19 | Henley Gray | Chevrolet | Belden Asphalt | 67/0 | 97 | Broken Control Arm | $1,030 |
| 33 | 13 | #48 | James Hylton | Chevrolet | Hylton | 64/0 | 82 | Broken Piston | $1,020 |
| 34 | 27 | #7 | Dean Dalton | Chevrolet | Dalton | 61/0 | 40 | Clutch | $510 |
| 35 | 17 | #47 | Bruce Hill | Chevrolet | T. Edwards | 58/0 | 34 | Cracked Cylinder Head | $500 |
| 36 | 35 | #10 | Ray Williams | Ford | Champion | 55/0 | 0 | Engine Failure | $490 |
| * Denotes Rookie | |||||||||