[aerohead]

I had an '82 model, and had progressed as far as cardboard mockups at the time a Southwest Airlines stewardess decided to dive her Rabbit through it, running a stop sign.
So I never got to find out.
Dr. Gino Sovran, of GM Research Labs had published an SAE Paper outlining the aerodynamics that would get a Chevette to over 50-mpg at the old double-nickel national speed limit.
I think it's a no-brainer.
Ironically, it was on a Southwest Airlines flight where I first saw the CIVIC CRX HF, which I immediately got on the list for, and bought within a month.
It was the 49-state car, with lower gears, and only good for 52-mpg, which would ultimately get over 65-mpg as Spindletop.