I wouldn't bother trying to fix that. Metal does not just get bent. It also gets stretched. That is hard to undo especially when it is that thick.
I can't picture what would have bent it that severely. Any ideas?
I good used replacement shouldn't be that hard to find
Carl

1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission