The Explorer head is commonly known as the GT-40 P head. It flows considerably better out of the box then the E7 head. Exhaust headers/spark plug clearance can be an issue.------------------
Alex Denysenko
Co-Administrator and Moderator
NHRA/IHRA/SRA member and licensed Superstock driver
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NHRA and IHRA SS/LA National Record Holder '00,'01,'02,&'03
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
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The Barry of BarrysGrrl
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