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| 1978-01 | Riverside | 35 | 21 | 28 | 70 | J.D. McDuffie | Chevrolet | 45/119 | 1,455 | rear end | 0 |
| 1978-02 | Daytona | 41 | 22 | 30 | 70 | J.D. McDuffie | Chevrolet | 132/200 | 2,880 | running | 0 |
| 1978-03 | Richmond | 30 | 13 | 27 | 70 | J.D. McDuffie | Chevrolet | 154/400 | 665 | engine | 0 |
| 1978-04 | Rockingham | 36 | 18 | 25 | 70 | J.D. McDuffie | Chevrolet | 266/492 | 1,550 | engine | 0 |
| 1978-05 | Atlanta | 40 | 35 | 16 | 70 | J.D. McDuffie | Chevrolet | 312/328 | 3,455 | running | 0 |
| 1978-06 | Bristol | 29 | 14 | 28 | 70 | J.D. McDuffie | Chevrolet | 16/500 | 770 | rear end | 0 |
| 1978-07 | Darlington | 36 | 24 | 11 | 70 | J.D. McDuffie | Chevrolet | 342/367 | 4,030 | running | 0 |
| 1978-08 | North Wilkesboro | 29 | 14 | 7 | 70 | J.D. McDuffie | Chevrolet | 390/400 | 2,200 | running | 0 |
| 1978-09 | Martinsville | 30 | 10 | 26 | 70 | J.D. McDuffie | Chevrolet | 140/500 | 840 | ignition | 0 |
| 1978-10 | Talladega | 41 | 40 | 40 | 70 | J.D. McDuffie | Chevrolet | 5/188 | 1,705 | engine | 0 |
| 1978-11 | Dover | 40 | 12 | 34 | 70 | J.D. McDuffie | Chevrolet | 35/500 | 1,010 | oil pan | 0 |
| 1978-12 | Charlotte | 40 | 30 | 22 | 70 | J.D. McDuffie | Chevrolet | 369/400 | 4,375 | running | 0 |
| 1978-13 | Nashville | 30 | 11 | 12 | 70 | J.D. McDuffie | Chevrolet | 388/420 | 1,285 | running | 0 |
| 1978-14 | Riverside | 35 | 19 | 24 | 70 | J.D. McDuffie | Chevrolet | 72/95 | 1,325 | transmission | 0 |
| 1978-15 | Michigan | 36 | 28 | 13 | 70 | J.D. McDuffie | Chevrolet | 191/200 | 3,000 | running | 0 |
| 1978-16 | Daytona | 40 | 20 | 12 | 70 | J.D. McDuffie | Chevrolet | 153/160 | 4,500 | running | 0 |
| 1978-17 | Nashville | 29 | 4 | 5 | 70 | J.D. McDuffie | Chevrolet | 413/420 | 2,445 | running | 1 |
| 1978-18 | Pocono | 40 | 18 | 10 | 70 | J.D. McDuffie | Chevrolet | 194/200 | 3,455 | running | 0 |
| 1978-19 | Talladega | 41 | 23 | 17 | 70 | J.D. McDuffie | Chevrolet | 172/188 | 3,635 | running | 0 |
| 1978-20 | Michigan | 36 | 9 | 7 | 70 | J.D. McDuffie | Chevrolet | 197/200 | 4,330 | running | 3 |
| 1978-21 | Bristol | 30 | 5 | 8 | 70 | J.D. McDuffie | Chevrolet | 481/500 | 2,220 | running | 0 |
| 1978-22 | Darlington | 40 | 24 | 20 | 70 | J.D. McDuffie | Chevrolet | 281/367 | 2,480 | engine | 0 |
| 1978-23 | Richmond | 30 | 12 | 8 | 70 | J.D. McDuffie | Chevrolet | 391/400 | 2,320 | running | 0 |
| 1978-24 | Dover | 37 | 1 | 33 | 70 | J.D. McDuffie | Chevrolet | 80/500 | 1,520 | engine | 10 |
| 1978-25 | Martinsville | 30 | 11 | 22 | 70 | J.D. McDuffie | Chevrolet | 409/500 | 860 | brakes | 0 |
| 1978-26 | North Wilkesboro | 27 | 14 | 11 | 70 | J.D. McDuffie | Chevrolet | 385/400 | 1,820 | running | 0 |
| 1978-27 | Charlotte | 40 | 22 | 11 | 70 | J.D. McDuffie | Chevrolet | 324/334 | 5,760 | running | 0 |
| 1978-28 | Rockingham | 36 | 20 | 12 | 70 | J.D. McDuffie | Chevrolet | 468/492 | 3,240 | running | 1 |
| 1978-29 | Atlanta | 39 | 16 | 14 | 70 | J.D. McDuffie | Chevrolet | 317/328 | 2,910 | running | 0 |
| 1978-30 | Ontario | 40 | 22 | 26 | 70 | J.D. McDuffie | Chevrolet | 178/200 | 1,885 | running | 0 |
