The alternator bolt to the block has broken at the block, again. It is a #8, plated. I am attempting to extract it and have been "trying" to drill a hole in the middle of it so I can screw the extractor into it. I am using a recommended titanium drill bits which came with the extractor kit I purchased at O'Reilly's starting with 1/8". It is like trying to drill steel with an aluminum bit. Does anyone have a suggestion as to how to drill it out or a different type of bit?