Sneaking in without a roll cage

Depends on the track and the day of the week. I have a buddy who had a 600 hp big block in his street Duster. It would run 10.90 at the track on street tires with a full interior and full exhaust system. He was able to race most of the summer until a guy he beat in a grudge match complained to the tower. But he was running at the Weds night street drags with a bunch of Honda fart pipe cars. I wouldn't try it at a NHRA divisional race. He was able to make about 40 passes in the car before he was kicked out. He had a thick stack of time slips in the glove box. The car didn't look fast which also helped. Black primer, flat hood, 15x8 wheels in the back with street tires, mufflers, etc.