Tips & tricks for taking out 71 Dart door window?

Allen tip in a 3/8 drive socket and a pull bar will be the safest tool.
Using a 'L' shaped Allen key... short end in the bolt, long end pointed down inside, so you can slip a box end wrench or short piece of pipe over it. When the bolt does break loose the door can cut your arm badly. Duct tape over those sharp edges, and long sleeves, can prevent blood loss.