Roll bar required?

My little S went 7.92/eighth with a 2.1 60ft. Does the mean if I fix the 60 ft, that it may be flirting with an install?
Not that I care much,cuz I'll probably never track it again.I just went the one time to get a slip to satisfy all the neighborhoodies who kept pestering me with " Okay so, how fast is it", to which I would repy "don't know, don't care. I built it to be a fun car, not a racecar". And FUN it is.