Antifreeze flush

I have a 1993 ford taurus 3.8L V6 automatic. I want to change my antifreeze. After draining the radiator, how do I get the antifreeze out of the engine block?

You find and remove the engine block drain plug.

If you can’t find an engine drain plug, fill the system with clean water, run the engine until warm, and drain again.

I need to drain the engine block because I am going to use some "barr’s leak head gasket repair. i don’t have a engine block drain plug. How can I drain the engine block?