It's strange, because the fuel in the filter and line will actually run back to the tank. (It's a clear plastic filter, so, I can see that it is empty.) Is there supposed to be some sort of check valve, or ball that stops the fuel from running backwards into the tank? I'm guessing that there should be something to keep the fuel in the line. Quite possibly the line is pulling air in because of one of the carbs?

The engine was swapped about 20 years ago, so, there is a chance that the part that is missing was not swapped over from the donor car.

It's has 2 4 barrel carbs on it.

Any thoughts, comments, suggestions?

-Ted