I was able to remove the running boards. The bolts I had not loosened I broke using the tighten rather than loosen method but the ones I had already loosened I could not get the head to engage to tighten so I cut them with a dremel cut-off wheel. In the process I discovered that the rear driver's side support bracket was broken between the top and bottom rivets so I will need to weld that as part of my frame restoration. While it will be a while before I need them I should begin my search for the special running board attachment bolts unless there is a better alternative?
