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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 key to finding otu how much power you have is volumetruic efficiency. something around the edelbrock performer rpm package can get a little over 1 hp/ci. so if u do a 393, that will gove you around 400 hp to the crank