Don't drill out the plug. Just take a punch and place it in the corner of the plug. Then whack the S out of it with a BFH. The plug will flip on its side. Grab it with pliers and pull it out. When re-installing the new freeze plug. Coat it with a thin layer of gasket sealer (I use that stickey brown S that comes in a white bottle with a brush). Drive the new one in flush with a proper sized socket or something similar.
Dale H
87T
Dale H
87T