[240scorpio]

Attached are pics of tank that came with my car, Uninstalled. Anyone have a fuel system diagram? The strainer has only ground, power/signal for gauge and outlet line. Tank has 3 openings. My assumption is the outside 2 are for venting purposes? And the center is supposed to be return? Although the pump on the motor only has 2 lines, which should be supply from tank and then supply to carburetor. For the record motor is a 67 400 from a firebird, wz coded. If the 3 openings are for vent what is proper line routing or can I plug them and run a vented gas cap? Thanks in advance.