[Luce]

Since this is inside the cabin of the car I would not rely on any fitting other that hard metal pipe. This means external fuel pump. It adds complexity and requires space, but a surge tank and jockey pump would be a nice addition. Fuel starvation with an EFI pump is a real problem. You lose fuel pressure and pump prime and the engine is dead until prime and pressure are regained, then you'll likely have a hiccup when the bubble makes it to the injectors.