I have an 1987 Monte Carlo LS. The passenger side mirror was never tight since I owned the car. I am referring to the complete unit attaching to the door, not the glass. The rear post was missing in the mirror that the 10mm nut attaches to inside the door. It was only held on by the front post and nut. So I decided that since it was real loos I would tighten the front one, well that came out too and I have no mirror now on the door. Question is what is the best way to put the post back into the stripped holes? I was thinking of getting some stainless threaded rod and inserting it with some JB weld into the holes to have new post, would that hold over time?