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5.0L (1979-1995) MustangTechnical 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.
Look to where the airbox is and follow the tube to the throttle body. If there's an object with a clip and wires in the middle of the tube between the airbox and TB, it's mass air. If it's just straight tube to the TB, it's speed density.