GT-40P heads are the ones from the explorers/mountineers. they will work with stock intake i believe but they require different headers due to different spark plug angles
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Grand Valley State University Senior Accounting and Finance Major
1985 Mustang GT 19,000 ORIGINAL miles, E-303 cam, edelbrock performer RPM intake, holley 600 cfm carb, MAC headers, windage tray, 8.8 rear end with 4.10 gears, 4"cowl hood, 5lug conversion, 04 Mach1 wheels.
http://www.mustangworks.com/cgi-bin/moi-display.cgi?1501
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