will need to know if your car has fuel injection first -
if its a carb engine you should have one pipe out of the tank at its lowest point to the engine via a filter and pump
if its a fuel injection you should have the same plus a return from the fuel rail on the engine entering at the highest point of the tank [theory being the system is pressurized to summink like 3 bar the fuel unused returns in a loop to the tank thats not used]
there are variations on these systems tho
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