PORSCHE RACING HISTORYPorsche 934 - Chassis No. 930 670 0173
10 July 1976 - Watkins Glen 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 14 | Porsche 934 | 930 670 0173 | GT | Al Holbert (USA)/Jim Busby (USA) | Holbert/Dickinson (USA) | 16th | 6th | 9th | 134 laps |
4 February 1979 - Daytona 24 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 93 | Porsche 934 | 930 670 0173 | GTO | Dale Whittington (USA)/R. D. Whittington (USA)/Preston Henn (USA) | Whittington Bros. Racing (USA) | 29th | 11th | 35th | 389 laps - Accident |
17 March 1979 - Sebring 12 Hours - World Challenge for Endurance Drivers
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 92 | Porsche 934 | 930 670 0173 | GTO | Dale Whittington (USA)/R. D. Whittington (USA)/Milt Minter (USA) | Whittington Bros. Racing (USA) | 44th | 16th | 13th | 94 laps - Suspension |