I kinda want to see what the wind would look like on this thing going 60 (96.5 km/h). I suspect you’d get more lift than is comfortable. And speaking as someone who’s had turbulence in a modern car (interstate driving into an Illinois windstorm), it’s terrifying even in a car that doesn’t want to roll over.

Edit: seriously thought about it and am more concerned about the moment/torque it might get from the wind