I was thinking. Why we don't have something like this. I only found this on they web Think the Shelby style look awsome, It's not posible to do something like the first image?
Here's the thread. He starts talking about it in post 298 but all of the photos are gone. http://mmb.maverick.to/threads/my-comet-gt-build.36382/page-20
Too bad the pics are gone, but nothing is forever on the internet...except maybe the stuff people would like to disappear. Wing-style spoilers are tradition in the Ford world, but IMO a ducktail or shelf-style would be a great look. It's more contemporary, more aerodynamically effective, and the styling of the car hints at it to begin with. Wouldn't something a little less like a factory Grabber spoiler and a little more like this look good? https://mustangattitude.com/mustang/1978/1978_00005_03.jpg