PORSCHE RACING HISTORYJohn O'Steen (USA)
1978 : Watkins Glen 6 Hours - 2nd in class
8 July 1978 - Watkins Glen 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 77 | Porsche 911 S | TA 1 | Bruce Jennings (USA)/John O'Steen (USA) | Bruce Jennings (USA) | 13th | 2nd | 40th | 122 laps |