Duster passenger side upper control arm mount repair thoughts needed.

If it's damaged and a poor repair, I would tend to cut out that section of the frame and replace it with a good rust free section.
(If you are or someone you know is a good welder)
That means the foot or so containing the 2 mounts for the upper control arm.
I would tend to look at the area closely to discover why the mount was screwed up and repaired in the past and go from there...