Its just hard to understand why you would want sue someone who is basicly complimenting your achievements by recreating a product of lesser value, and likeness but then again it confusable with a real cobra. you know aluminum and Fiberglass is reall close, I might get confused too.
When painted, I doubt that most people could tell the difference between aluminum and fiberglass. Also, the shape of the Daytona Coupe is part of the "trade dress" right that Shelby owns (as asserted in the filing).
Let's look at it this way. Let's say you made sterling silver Rubber Ducky hood ornaments for Lincolns. You spent a lot of time and money developing them, making them capable of withstanding the elements, marketing them, etc, and they become an iconic hood ornament for Lincolns, so you get trademarks and trade dress protection for them. Maybe you even get trademarks on the name Rubber Ducky.
After a few years, things happen, and you stop selling them for awhile, maybe due to reasons beyond your control. Eventually, you start selling them again, or maybe you license your trademarks and trade dress to another manufacturer so they can make them.
Well, while you're not making them, along comes Frogman, and he starts making fiberglass knock-offs for those who want a Rubber Ducky hood ornament. These look "confusingly similar" to your hood ornaments, and Rubber Ducky is even mentioned on his web site (maybe just in the META tags). Then he sells them for half the price of your hood ornaments. Don't you think that would dilute your trademark and diminish the value of your hood ornaments? Maybe he started with good intentions, but he's now competing with you, using your own trademarks and trade dress. Does that sound right to you?