Frontal area is relatively small for as heavy and powerful a car as it is.
I don't remember the numbers but I compared my SuperCoupe to my Tempos and the aero drag was pretty much the same.
I don't think the abrupt rear window angle is all that bad, especially with the sorta-high trunk lid. A proper spoiler back there would really clean that up.
Same for the Tbird even though the rear window area is the main difference tween em.
