What size battery for a Chevy 305?

For a Chevy 305 engine, a typical battery size is Group 75 or Group 34, which provides adequate cranking power and fits well in the vehicle's battery tray. It's important to ensure the battery has a minimum of 600 cold cranking amps (CCA) for reliable starting, especially in colder climates. Always check the owner's manual or consult with a professional to confirm the best battery specifications for your specific vehicle model.