Well, I'm heading home with it. He pulled up several pics on his phone and we all came to the general conclusion that it isn't B5. The paint shop wrote "EB5" on the can. But it's a sweet color and I can live with it. So I paid the man and loaded it up. I'll post pics later.
That shop was INCREDIBLE. He is one of, if not the nation's top mustang and Shelby guru. A lot of nice cars in there.