Hammer, punch and a medium pair of channel lock pliers. Take the punch and place it in the corner of the freeze plug. Tap it gently until it turns sideways in the bore. Then take the channel locks and turn them so the curved part of the jaw is against the block. Grab the plug by the side and simply "rock" the curved part of the channel locks against the block. The plug will come right out. Don't sweat it if you knock the plug all the way in. Just grab the side with the channel locks the same way and pull it out.