65 Dart gas tank leak

That picture gave me an idea (UH-OH!!) Wouldn't it solve both of your problems if you could find an in-tank pump that would fit through the hole where the sender/pickup goes? You'd need to run the power wire through the plate alongside the sender wire with a similar pass through fitting. Maybe a small sump in the bottom of the tank where the pump could sit?? Doesn't seem like rocket science to me.

BC