71 dart, collapsible column?

Not sure about 71, but 68 is a combination of engine bay and under dash. Under the hood where the shaft goes into the approximately 2 inch collar, is a molded plastic piece that is the shear point I believe.
Up under the dash is the mesh steel and the three bolts that hold the column to the dash with plastic sliders/shear point.
Probably somebody else can describe it better, and tell you if 71 is different.