PORSCHE RACING HISTORYBob Tullius (USA)
1970 : Watkins Glen 6 Hours - 1st in class
1 February 1970 - Daytona 24 Hours - International Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 77 | Porsche 911 T | GT2.0 | Bruce Jennings (USA)/Bob Tullius (USA) | Toad Hall Racing (USA) | DNF | 35th | 279 laps - DNF |
21 March 1970 - Sebring 12 Hours - International Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 77 | Porsche 911 T | GT2.0 | Bruce Jennings (USA)/Bob Tullius (USA) | Bruce Jennings (USA) | DNF | 46th | 78 laps - Engine |
11 July 1970 - Watkins Glen 6 Hours - International Championship for Makes
| No. | Car | # | Class | Drivers | Entrant | Pos | Class | Grid | Notes |
| 77 | Porsche 911 T | GT2.5 | Bob Tullius (USA)/Bruce Jennings (USA) | Toad Hall Racing (USA) | 13th | 1st | 24th | 233 laps |