PORSCHE RACING HISTORYMonte Shelton (USA)
1976
2 May 1976 - Laguna Seca 100 Miles - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 57 | Porsche 911 Carrera RSR | 911 560 9122 | GTO | Monte Shelton (USA) | Monte Shelton (USA) | 8th | 7th | 7th | 50 laps |
3 October 1976 - Laguna Seca 100 Miles II - IMSA - International Motor Sport Association
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 57 | Porsche 911 Carrera RSR | 911 560 9122 | GTO | Monte Shelton (USA) | Monte's Motors Co. (USA) | 27th | 21st | 10th | 46 laps |