In the picture it looks like the arm and track assembly is crooked on the column, as if something is bent inside it. But you make it sound like it is merely leaning forward on the base, as if the base as been bent. If it is only the base that is bent you can force it up to level several ways. I'll have to go look at mine to see what can be done, the base seems identical to yours.
But first, please clarify the problem. Can you raise the arm up down on the column with the crank? Can you slide the yoke back and forth on the arm? Can you use the controls to rotate the yoke on the arm and the head inside the yoke? If all those controls work properly then it is just about getting to stand vertical on the base.
Go to the first page of this thread and there are links to download the appropriate manuals:
https://forum.shopsmith.com/viewtopic.php?p=145274#p145274
