PORSCHE RACING HISTORYBill Whittington (USA)
1983
19 March 1983 - Sebring 12 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 94 | Porsche 935 K3 | 000 0009 | GTP | Don Whittington (USA)/Bill Whittington (USA) | Henn's Swap Shop Racing (USA) | 12th | 5th | 9th | 218 laps |
24 April 1983 - Riverside 6 Hours - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 09 | Porsche 935 L | 935 L | GTP | A. J. Foyt (USA)/Mario Andretti (USA)/Bill Whittington (USA) | PPG Industries (USA) | 37th | 11th | 10th | 81 laps - DNF |