Sort of depends on what you consider a "street car".
To me a "street car" would not require a roll bar, and be something with all the seats front and rear that you can put all your friends in and cruse around in.
On the other hand there is the "Street Legal car" which is really a racing class where the car would be "Legal" to drive on the street. The Legality of "Street Legal" varies widely.
I just don't care to have to climb around roll bars (with door bars) and cages, sit in "race seats" with 5-point harnesses, and have to wear sfi spec clothing to drive a "street car".
It is not just the rollbar/cage, but all the other regulations / certs that have to be kept up to date, like belts every 3 years, if you are going to race your "street car" at a track.

If you want to go fast at the track, it is likely better to just build a "race car".