Dart or Cuda?.... Daytona style

Here are some Superbird details:

The Superbirds (and Daytonas) had different back glass. The glass was smaller and more rounded than on the stock cars. This was done for aerodynamic reasons.

The fender vents were not actually for venting air: they were for tire clearance when the cars ran hard into the corners.

The wing: I saw the wind tunnel test results. It is public knowledge that the wing provided downforce to the rear tires. The force began taking effect at about 60mph, depending on the angle dialed in. However, the unpublicised secret was the directional stability provided by the vertical stabilizers.