PORSCHE RACING HISTORYBrad Frisselle (USA)
1978 : Talladega 6 Hours - 1st overall
5 February 1978 - Daytona 24 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 59 | Porsche 935 | 930 770 0909 | GTX | Peter Gregg (USA)/Claude Ballot-Léna (F)/Brad Frisselle (USA) | JMS Brumos Porsche (USA) | 9th | 6th | 6th | 621 laps |
18 March 1978 - Sebring 12 Hours - World Challenge for Endurance Drivers
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 59 | Porsche 935 | 930 770 0909 | GTX | Peter Gregg (USA)/Brad Frisselle (USA) | Brumos Porsche (USA) | 69th | 21st | 4th | 11 laps - Accident |
2 April 1978 - Talladega 6 Hours - World Challenge for Endurance Drivers
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 59 | Porsche 935 | 930 770 0909 | GTX | Peter Gregg (USA)/Brad Frisselle (USA) | Brumos Porsche (USA) | 1st | 1st | 1st | 175 laps |