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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.
the stock blocks start breaking down at about 550hp if its not beat on but also depends on the block a friend of mine cracked his block at 450 but then again he was spraying the ***** out of it