1964-65 Barracuda question

Since you could practically get every option that the Formula S came with, it can be very difficult to determine without the fender tag or broadcast sheet.

Although from my experience, one is more likely to find a Formula S vs. a car that has been heavily optioned to the point of being a Formula S. - would others agree?

Some thoughts:

-The 8 3/4 could be non-original
-As mentioned, dual exhaust is not original
-front swaybar could also be non-original
-The fenders would have come with an emblem towards the front with in this case either one that said 'commando V8' or 'S' (designating a formula S).
-The 150 speedo and tach is very hard to find - I consider myself very lucky to have found one on ebay for a descent price.