i forgot to mention the gt40p's aren't drilled for smog either so i don't know if thats going to affect you or not. the e-303 cam is about the best emissions cam that you can get. i used the lunati 51014 cam cause i thought it was the best for these heads. don't forget valve springs, if i remember correctly the explorer revs to like 5200rpm. aftermarket valve springs will make sure its ok to rev that thing to 6200rpm. if you use the same cam i did with springs expect around 250-270rwhp with the correct tune.
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07 GT, Whipple H.O. genII, VMP tune, 471 hp and 473 tq, Mcleod RST, Roush tensioner, Kooks LT's w/catted X, Frpp stingers, 3.73's, MGW, Steeda ultralites, Roush RR03 18x10's, 11.67@119
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