How do you straighten a k-frame off the car? Is it worth it?

I've got a '73+ V8 k-frame that is pretty rough. Had a LCA tube broken loose and fixed already but yesterday I discovered it is either twisted or one of the legs is bent. Found this by flipping it over and setting the 4 mount points on 2x4's and one is 3/16" to 1/4" off the plane of the others.

How do you tell what needs to be moved? And how do you tweak it once you do?

Is it worth it to even mess with it? Or will it forever be "off"?

Any drawings or dimensions to use as a reference to compare to?

I had planned to get this one gusseted and such and then use it for my Hemi swap. But hate to take a good one out and put in a tweaked one.

Thanks.