FYI Jeep puts locktight on those bolts, at least they did on mine.
My trick on them...
I bought a 3/8 torx to fit the windshield bolts, its an extra long one.
Put the torx in the bolt head and heat the shaft of the torx bit while
pressing down hard, it will transfer heat into the bolt without heating
the surrounding area up much.
Then put some pressure on the bolt as if to tighten it. Then try loosening.
BTW use a quality torx bit, the cheap ones slip out too easy.
I've also used a dremel to cut teh stock hinge off
Dave