I know how you feel. When I got my dart it had a custom spring over rear 7 1/4 and the swing shackles were gone. The rear the spring was welded solid to the frame rails where the shackle should have been. LOL Now you see why I went to a 4 link.
Other modifications by this genius are mini van bucket seats, ford motorcraft carb with 2 adapter plates and a cobbled on toyota alternator.