I’m not sure on anything except the Daytona body and it’s instability over 150 MPH.
Interesting thing about the tail cones. There is a huge exit loss at the back of those trailers. The air is crashing back into the end of the trailer trying to fill up the space, which is lower pressure. That creates vortices which cause drag. It’s a great study to watch the air move around the back of those trailers. It’s a very good object lesson.
Anything you can do to put the air back together smoothly at the end of the trailer reduces drag, and therefore increases fuel mileage.
