How do you tell if a car is a Formula S or not originally?

Buckets and a V8 back in the early A body is a dead give away, the later would have
been badge as a Cuda and not Barracuda...... S package was V8 and never a bench
seat in an early A (S) package...all Bucket seat cars was S models 2 barrel or 4 barrel V8 cars.
(S) package early A's even had hub caps I believe
Sorry Mike this is not true.