New here 72 GMC C2500

[72GMC25]

Hello! We are new here and new to these trucks.
The wifey and I just picked up a 72 GMC C2500, we purchased it as a weekend driver/fishing truck. She runs strong but needs some rust repair. We were wondering if there are any common problem areas with these trucks? We are also looking into the 5 lug swap, headers, and some other upgrades. I know nothing about these trucks so any tips/advice/info and where to buy parts would be greatly appreciated. We are going to address the rust first and go from there.

Here are some pictures of her currently.









This is my other baby.