I'm impressed you remember what it was like to have sex with an 18 year old!
Sounds like you are about to replace the inner fenders (aprons). That passenger side is Swiss cheese.
Repops are available. Just inspect your existing ones carefully and look for the spot welds every couple inches around the perimeter. I use a Blair spot weld cutter and drill them out. It helps a lot to center punch each weld in the center and then drill. Then pry the panels apart. It also would help to have new ones on hand as it makes it very clear what needs to be done.
Nice build and worth doing it right.
