my new 65 barracuda

64physhy said
It's a cammando engine, which would be correct for a Formula S. If it has swaybars, then it should be an S.

Swaybar does not mean its an S. I now have a couple Commando cars with a swaybar that are not S cars. The fender tag is the only way to confirm an S option or a dash mounted factory tach.