I hope the inside of your fuel tank looks as nice as the outside, but unless you live in Arizona or the desert, seems unlikely from my experience. Those are tough to find nice inside anymore. On my 69 T & C wagon, I will need to have mine cleaned and coated on the inside too. It is marginal as it is, so I am hoping for the best.
I am not sure just how the limit switches work in those motors. But I might have the operating shaft for the headlights. I have quite a few of those, but they all differ in length among the various car models, and the part of the motors where they go through also differs in dimensions among the various models and even model years. So I am hoping you have your original motor and that it works, so that what I might find will actually work for you.
Yes, the port at the top of the fuel tank is for the evaporative emissions to be sent to the charcoal canister up front, where they would later be purged by the engine.