Before you drive a socket on the bolt, try heating the bolt til it turns red. Then quench it with either ice or co2. This expands the bolt then shrinks it as well as cracks any rust. This old trick that my dad taught me about 40 years ago has never failed me. Also the parts stores (Auto Value/Bumper to Bumper) has a spray that not only lubricates but also freezes the bolt thus cracking any rust and this works great. If this fails, grind the head of the bolt off and remove the flywheel. You might be able to weld a nut on the bolt and back it out. Just my $.02 worth. Don
