72,91,92,96,99 Cadillac C-10 Pickup truck

[Longhorn Man]

Almost forgot, the rear of the truck cab in perfectly verticle, then there is the bed that catches air, and then the verticle tailgate too. In the aerodynamic world, the rear is almost as important as the front. Picture the hull of a canoe. It slices through the water, then puts the water back in it's place with minimal fuss and turbulance.