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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.
In most cases with aftermarket pistons you have a good bit of valve notch for valve clearance BUT just make sure if you are going with twisted wedge heads to get the probe pistons with the right notchs for them. If you get into some long duration cams it could run into PTV clearance issues. They have a piston that will work with both