Good photo to show the problem.

Obviously take out the brake assembly, then remove the bottom head set outer bearing cup, then try, & see if its possible where the flex has been, maybe even a hairline crack. This being an older fork it has the flat top ornate fork crown, you maybe able to see if this has flexed. I personally would attempt to straighten it, but you have to be very careful to ensure the area where the bottom head bearing cup is that does not flex otherwise again it will bind when turning.

Again as correctly mentioned above an OLD school bike mechanic would attempt to straighten it