This sounds similar to my truck.
My advice would be to fix it if you just want it to be a solid driver. Try to use a oily rust proofing on the back of any repaired areas. If you are going to keep the truck forever - buy rust free oem parts and swap them.
I see a lot of people stress over repairing this stuff the 'right' way. To some extent, it just doesn't matter because of the stuff that people have told you about in the previous posts.
My advice would be to fix it if you just want it to be a solid driver. Try to use a oily rust proofing on the back of any repaired areas. If you are going to keep the truck forever - buy rust free oem parts and swap them.
I see a lot of people stress over repairing this stuff the 'right' way. To some extent, it just doesn't matter because of the stuff that people have told you about in the previous posts.