My favourite wild design: the first AVS (Advanced Vehicle System) Shadow Can-Am car, 1970 - which went to great lengths to acheive a wedge body with minimal frontal area. It used special small diameter tires by Firestone. If you're looking for the radiator, it's in the rear wing - the only place where there was room for it. I'm sure most of the aerodynamic drag came from the exposed monster V-8. (Thanks to itsawheelthing at tumblr.)