Z-doods...what is the deal here... 77Z ignition switch. Where the four screws that hold the switch clamped around the column there is only two screws and in place of the other two are what looks like rivet heads [not screw driver head] I thought they might be unthreaded pins and have tried to punch them out from the back side,but they don't budge. They may be threaded,but I don't know how they screwed them in,let alone how you can unscrew them.... Anyone been through this?? I'm at a loss.... HELP