Is this enough space on my rear wheels? 18” wheels

On the street, I've run down to a quarter inch, with 325/50-15 BFG DRs on 10" wheels @24psi, with offset springs that are de-arched to nearly flat.
But; when cornering, the entire body shifts sideways on the rear shackles, and the tires rub on the inner wells, which have a static 3/8ths inch....... but amazingly not on the springs. So, on the street, I slow down, lol.
They are fine for dragracing, even down to 12 psi.