High-Probability Indicators (but not definitive proof without documentation):
* Engine Compartment: Check for correct engine casting numbers, date codes, and associated components (carburetor, intake manifold, distributor, etc.) for the engine options available on a Formula S. Incorrect components are a strong indication of a non-original or modified car.
* Drivetrain: Inspect the transmission, rear axle, and differential for correct casting numbers and codes, ensuring they match what should be on a Formula S based on the original options.
* Suspension & Brakes: Examine the suspension components and brakes for factory-correct parts. Formula S models might have specific components depending on option packages.
* Interior: Look for correct seat material, upholstery, badging, and interior trim. Inconsistencies here suggest modifications or incorrect restoration. A build sheet would confirm original interior codes.
* Body: Check for the correct body-specific features for a '69 Barracuda, and then for Formula S specific details such as the unique badging (if still present), and any trim or detailing specific to the model. Any inconsistencies in body lines or panels could suggest repairs or modifications. A professional body assessment could help detect non-factory repairs.
* Build Sheet (if miraculously available): While you stated there's no fender tag, there's always a (small) chance that the car retains a build sheet. These were placed in various locations (sometimes in the glovebox or under the carpet) and often survive even when fender tags don't.
Low-Probability Indicators (supporting evidence only):
* Original Owner Documents: Any paperwork tracing ownership back to the original owner or early owners could provide clues, but these are often lost over time.
* Original Sales Literature: Any brochures or advertisements that are contemporaneous with the vehicle might mention some of the options it had.
Important Considerations:
* Restoration Quality: A meticulously restored car might have factory-correct components, but if the restoration isn't documented, it's impossible to verify the car's original state.
* Modifications: Many 69 Formula S Barracudas have been modified over time. Modifications can make it virtually impossible to ascertain originality without thorough documentation.
In short: Without the fender tag or other compelling documentation, determining the authenticity of a 1969 Formula S Barracuda is a highly challenging and subjective process. Even with extensive research and inspection, you may not reach a definitive conclusion. Consult with experienced Mopar muscle car experts or restoration specialists. They often have access to databases and resources that can aid in verifying the car's authenticity. They can also help identify subtle clues.
