Rust problem 74 Duster

Well, I'm not sure how bad you think it is, so I don't know about that. Just based on the couple of pictures you posted though there is a lot of work that has to be done. The car is fixable, but, pretty much ANYTHING is fixable with enough time, skill, and money.

What you have there is a big project that will require more than basic skills to repair. I totally understand sentimental value. As long as you understand it's not financially worth it to fix that car, that's ok. But from what I can see, more people would part that car than fix it.