William Koch (USA)
1978
26 November 1978 - Daytona Finale 250 Miles - IMSA - International Motor Sport Association
No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
40 | Porsche 914/6 | GTU | Steve Southard (USA)/William Koch (USA) | Performance Specialists | 59th | 14th | 75th | 7 laps - DNF |