5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

Novice 5.0 stock 5.0 fuel rail question

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Old 12-22-2009, 01:29 PM
  #1  
shelbymustangdan
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Default Novice 5.0 stock 5.0 fuel rail question

I'm droping a 5.0 in my 67 coupe. The stock fuel rail I have has both fuel line connectors on the passenger side of the engine. One connector (or receptical) is larger than the other.

Which one is the fuel delivery line?
Which one is the fuel return line?

The smaller connector, the larger connector, the one closer to the front, the closer to rear, etc.?

None of the 5.0 tech manuals I have really show this clearly.

Thanks very much!
Dan
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Old 12-22-2009, 02:21 PM
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blwn93gt
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The smaller line is the return line.
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Old 12-25-2009, 01:24 PM
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mjr46
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larger feed and smaller return as stated, -AN fittings can be found at summit racing to smap in place
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