Just replace the fuel lines.
You can buy them as a kit or buy some lengths of Tygon fuel line & a filter.
They are not easy to get into the tank because the holes are smaller to make a pressure tight seal ( or it will leak ).
Slip a drill bit inside the fuel line to help push it in or some trimmer line.
1. Insert a length of metal wire into the fuel line hole and feed it out through the fuel cap opening.
2. Cut the end of the fuel line to a taper with scissors.
3. Punch the wire through the tapered end and bend a hook so it will stay on. Sort of like baiting a fishing hook.
4. Pull the wire and the end of the taper through the fuel line hole.
5. Once the end of the taper is through, use pliers to pull the rest through.
6. Once you have the line where you want it, you can cut the taper off.