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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.
ok this question may have been asked already but i dont know so i have a set of gt40 heads that say gt on the top corner and have three lines on the backside and the frontside and they are iron are they gt40s or gt40p's?
I have a mustang performance book that says that GTP's will have "GTP" stamped into the end of one of the heads. They showed a pic of it; it is stamped in and at an angle.
There ya go. You can see the ribs that should tell you they are "P's" if you have the same count of ribs. You can also see the "GTP" cast into the head down by the injectors.