73 Duster - how to removal rear windshield = want to reuse gasket and glass

Okay I'll play it back to you and weight it out loud for you. It's not impossible, it's not probable. If the glass is great and there's no need at all to replace the glass itself I would likely just cut the gasket and save the glass. If you try for it and you cracked the glass you'll be paying for both guaranteed. I'll be darned if I'll buy a brand new window and put it in an old gasket.
I'm replacing my windshield at the end of the week and I know the gasket for that is like 75 to $100. I can't imagine the rear being more than that?