Custom rear spoiler for the Missile

I understand about the wings having to be in the airstream. But from what I've read the main reason the wings were as tall as they were on the Daytona and the Superbird was because they had to be sold to the public & if they were much lower the trunk lid wouldn't open. I think the wind tunnel testing had shown they were effective at a shorter height but they were raised for trunk access. I do agree with the part about the vertical stabilizer effect.