PORSCHE RACING HISTORYJohn Thomas (USA)
1978
5 February 1978 - Daytona 24 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 60 | Porsche 911 S | GTU | John Thomas (USA)/Ren Tilton (USA)/Rusty Bond (USA) | R & R Racing | 17th | 5th | 34th | 551 laps |
8 July 1978 - Watkins Glen 6 Hours - World Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 71 | Porsche 935 | 930 770 0910 | Gr.5 | John Thomas (USA)/Otis Chandler (USA) | Otis Chandler (USA) | 6th | 5th | 15th | 132 laps |