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

Josh owen said
I have a 71 slant 6 k you can have. if it's of any help for you at all

Thanks. It would need to be a '73 or later V8 k-frame to be useful to me.

I do have a k-frame I modified years ago that I could use for sections if need be. Won't work in this project but might be worth the metal.