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Raw fuel smell, 240Z

I have been chasing a raw fuel smell in my 72 240Z for several years through four mechanics. New fuel pump with auxiliary electric pump at tank. Strong fuel smell only when driver side window is open (I do not drive with passenger side window open). See no leak from fuel delivery system under hood. Car is stock. Fuel tank has been rebuilt and exhaust system checked. Otherwise, car is near perfect (#2) because of my credit card! Help