Gas Cap question

72RoadrunnerGTX said:

As stated, if the car was equipped with a fuel pump mounted vapor separator, a ’71 440 should have been, the 1/4” return fitting would have been plumped back to the sending unit via a third ¼” line. The 5/16” line from the fuel tank vapor separator/expansion tank needs to go to the 3-nipple breather, this effectively is the fuel tank vent.

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