95, 96, and early 97 Explorers have the GT40 heads - with the "GT" and 3 bars cast into them. The GT40P heads came on later 97 cars, had "GTP" cast into them and had four bars instead of the the three shown in that pick.
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Tom (Torque) Moss
88Gt 5spd Vert, FLowmaster Catbacks, stock cam advanced 4° @ 108.5° ICL, NMRA prepped GT40P heads 1.85/1.55 valves and 1.7 rockers, MAC P headers Jet-Hot coated, 97 Exlporer intake (ported lower), TB and injectors. 277RWHP/330RWTQ (SAE).
http://www.fastlanecars.com/
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