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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.
Well sounds like its time to pull the engine you can't just keep guessing for ever its time to roll up the sleeves and get dirty lol but seriously I think the only way you are going to pin piont this problem is if u pull the block