A-arm ball joint

Assuming it is still in decent shape, take it to a shop and ask them to hit it with an impact wrench. Any decent shop won't charge you for a quickie like that, but even if they do, at least you could stop pulling your hair out.
 
I:II:II:II:II:IYES! YES! YES!I:II:II:I It is fixed!!!! Thank You to all that gave addvise. You guys are great. I found some vise grips and was able to get the nut off. Removed the a arm from the spinndle. Ran the nut all the way tight, then back off. put the spindle back on and was able to tighten the nut down below the shaft. Placed it in the table vise and tightened the mother down! It is in place and staing there. Lol. now all I have to do is repaint the arms from where it got all scuffed up from working with it.I:II:D Once again thanks to all my bros that took the time to help me out.