I traced the fuel line from the carb to the rear, no other pump found. Line fed into the left side of the regulator in pic. I crawled deeper under to try and get a better pic. Wish i had a lift.
Looks like it might be square sided. It might be a fuel cell, and it might have an in-tank pump.
Assuming the leak is in the lines, you could keep that. Run a short flexible line to a copy hardline, then to a regulator, then filter and to carb. If you must use hose for distance, then something like AN (Army-Navy spec) is the best choice, although expensive and a PIA to work with.
You probably find a block off plate on the engine where a mechical pump goes.