A 1965 Ford Falcon typically used a
Group 1 size battery. However, it's crucial to
check your owner's manual or the battery tray in your car to confirm. Battery sizes can vary slightly depending on options and the specific model of Falcon (e.g., Futura, Sprint). The group size is usually stamped on the battery itself or the tray.
Don't rely solely on the year and model; always verify the correct size before purchasing a replacement.