To find the correct transmission, you need to specify:
* Year: The model year of the vehicle is crucial.
* Vehicle: What type of vehicle was it (e.g., Ford Falcon, Ford Ranchero, Ford pickup truck, etc.)?
* Model: The specific model within the vehicle type (e.g., a 1965 Ford Falcon Futura vs. a 1965 Ford Falcon Sprint).
With that information, you can then consult a Ford parts catalog, a repair manual specific to your vehicle, or online resources dedicated to Ford vehicle specifications to determine the original transmission that was fitted.
Keep in mind that many different transmissions *could* have been swapped in over the years, depending on modifications or repairs. The original equipment is the most reliable starting point.