Having a fit with the passenger's drum on '67 Dart

Back off the adjustment on your parking brake adjuster. Also looking at your picture on my crappy monitor you may be missing the strut bar and spring. Looks like it's just an adjustment problem though.

The adjuster is completely tightened down, and the back brakes only have the strut bar and spring. That's what the shop manual shows, too, that the bar and spring only go on the back.