What freeze plug hole does a block heater go on a 300 six ford?

On a Ford 300 inline-six engine, the block heater is typically installed in one of the freeze plug holes located on the driver's side of the engine block. Specifically, it usually goes into the freeze plug hole closest to the rear of the engine, which is generally the second freeze plug from the back. Ensure proper installation to avoid leaks and ensure effective warming of the engine coolant.