First off, welcome!!

I think you'll have a good time here, at Camaro5.
I did want to comment on the last point you made;
The camaro is really no bigger than the Current Mustang in any dimension. (If anything, see roof-height below, it's
smaller)
Don't think for one second that the engineers are ignoring the effects that those wheels may have on the perforrmance of the car. For instance, notice how the same style from the concept car's rims is evident...only with MUCH thinner spokes??
Don't worry too much about that, They know what they're doing.

Take the G8 for example.