1965 Formula S Barracuda

Good day Y'all,
The only motor that came as the standard in the Formula S option was the 273 Commando up until 66. The engine was an option in any other vehicle choice.
And the only differences between the Commando/Charger motor was the label on the A/C and some coloration.

Keep digging on that history if you have any leads. Provenance is becoming more valuable to not only the personal history of the car, but to the actual
monetary value as well. Thanks, C.