I know its a hard bolt, but if you take a good small drill bit like a 1/8 and drill slowly so as not to burn out the drill bit...then move to a little bigger bit, and so on...then try to pound it out after you have drilled out the threaded end past the inner of the clamp.Drive a wedge into the flange to try and loosen it some. Anything else your going to need it red hot, then cool it quickly with water...and pound away. Tell the wife to go read a novel...you should be done before her.
