First, update your profile with your location so someone near you can offer to help-need to know where you are. If you are uncomfortable with that, no problem, you can limit the entry to the state you are in.
Next, we REALLY need to see some good pictures of the damage to determine if you can straighten it, or if you need to cut it out and replace it.
I just went through this problem on my 66 project. I whaled on it with a big hammer and a port-a-power. But I only needed to move the mount surface less than an inch. I took a bunch of measurements, pressed it out past what I needed, and it came back to where it should be. Alignment guy was happy. (I was ecstatic..to say the least). So, it may not be as bad as you describe, cause my alignment guy made it sound like the end of the world...
Try to get some pictures posted up. It will be easir with a photo hosting service like photobucket or some other hosting service. We can help with that too.
Oh, if it's a 70, you have more options cause it's moderatly adjustable. You can get away with replacig the mount, and the alignment guy can compensate for any "minor" placement errors of the new mount by adjusting the strut rod.