"Can't remember for sure, but don't you help or work for a shop that specializes in Vintage race cars? Sorry if I'm incorrect."

Yeah, guilty as charged. Have a few under my belt; mostly hired on to projects. Not many well-known cars, except the ex-Penske ex-Roy Woods #1 '71 Javelin. The '67 Mustang I referred to was a Shelby customer car still owned by its original purchaser. Each one of course requires research either to confirm that what you have is correct, or to find it.