For GT40P's factor in the special headers required to fit the angled spark plugs. I think these folks
carry the headers http://www.centralcoastmustang.com/ a great website for the GT40P's, check out this link http://www.geocities.com/motorcitymustang/gt40p.html
1966 Mustang Coupe, 302 custom roller cam, holley 650dp,http://www.289mustang.com
http://www.289mustang.com/images/vmfcar.jpg
carry the headers http://www.centralcoastmustang.com/ a great website for the GT40P's, check out this link http://www.geocities.com/motorcitymustang/gt40p.html
1966 Mustang Coupe, 302 custom roller cam, holley 650dp,http://www.289mustang.com
http://www.289mustang.com/images/vmfcar.jpg