Okay, so here is the heart of the problem. This fuel line goes from the fuel pump and then disappears into the chassis. There is no access under the tanks, no panel to remove, no nothing that I can find. Perhaps I'm missing something - that's one of the points of me asking here. This fuel line disappears into a hole in the wood in the chassis:
Here you can see the fuel line that disappears into the chassis. This photo was taken from above, looking down into the engine compartment. The green arrow points to the fuel line as it enters the wooden part of the chassis:
On the right side of the car, there is a "trap door" panel there so that one could presumably access the exterior "roof switch" that is basically the "door lock" key to get into the car. Looking down through this shows a piece of wood and not much else:
Here's a shot from underneath the car showing the line going into the hole in the wood panel. You can see it's starting to deteriorate quite a bit:
Here's a close-up photo of that same line that is beginning to fall apart:
Here's a photo of the entire inner fender well. this is all wood and fiberglass all meshed together. My thoughts are to cut an access hole in the bottom of this and make a similar "trap door" to be able to access the bottom of the tank. Where to drill and how big and how to figure out where everything is - well that's some big questions:
Here's the left side fender. The connection to the tank is on the other side of this panel, presumably. I'm not even sure if this is wood, or fiberglass, or wood covered with fiberglass. Who knows? I started to peel off a bit on the bottom and then stopped. The green arrow shows just the tip of the fuel line sticking out as it enters on the right side:
Here's a close-up on the left side fender, right where I had the green arrow pointing in the previous photo.