solid, I'm not sure simmons ever actually says his V6 is a Shelby, it just has a very similar style.
I'll let you guys know how it goes. I'm not sure about a youtube vid, but maybe an audio clip of him saying "whaaaaat?!"
As Charlie pointed out earlier, he even has Shelby badging on his car.
As for the Boss guy, he'll probably be reluctant to hear anyone say his car is anything but a Boss and will probably ignore your advice too.