I have been looking for a spare set of 1979 AC lines for a 5.0. They are obsolete and I have the pair that is on the car, but I also wanted a spare set because they are so hard to find. Well, I bought a set and they were really rusty. They had not rusted all the way through but a little longer and they might. There is a company that will restore the lines but can be expensive depending on the condition. I will let them fix these but I wanted to see what I could do first.
1. The AC Lines before
2. So using Evapo-Rust I let them soak for about two weeks, taking them out periodically and scrubbing using an old tooth brush.
And after I removed them and washed them off and let them dry. What do you think? Not perfect but a lot better.