Honestly, I don't know what. Here are some ideas, just so I have them documented:
- Carburetor rebuild
- More and more vacuum hoses replaced
- (extreme) engine rebuild (new crate engine/engine swap??)
- Valve cover gaskets replaced
- Oil pan gasket replaced
- differential gear oil checked/changed
- coolant flush and fill
- weatherstripping replaced
- window felts replaced all around
- front/rear bumper fillers https://www.steelerubber.com/
body-filler-rear-4pc-kit-70- 2892-75