PORSCHE RACING HISTORYJohnny Rutherford (USA)
1978 : Daytona 24 Hours - 2nd overall : Talladega 6 Hours - 3rd overall
5 February 1978 - Daytona 24 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 6 | Porsche 935/77A | 930 890 0033 | GTX | Dick Barbour (USA)/Manfred Schurti (FL)/Johnny Rutherford (USA) | Dick Barbour Racing (USA) | 2nd | 2nd | 8th | 650 laps |
2 April 1978 - Talladega 6 Hours - World Challenge for Endurance Drivers
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 6 | Porsche 935/77A | 930 890 0033 | GTX | Dick Barbour (USA)/Johnny Rutherford (USA) | Dick Barbour Racing (USA) | 3rd | 3rd | 3rd | 161 laps |