What’s the exact process to identify a real 66 Formula S Barracuda?

LO23M8B said
I'd have to dig up the IP I have but I do believe it's a 150 with a tach. But it will be a little while before I can get to it.

I just dug it up it's a 150 speedo with a tach and a trip (I misspoke before I said no trip).