just got back from driving a 06 f250 crew cab 8ft. bed 6.0 a/t lariat. just like mine but not a f350 and it only had 10 miles on it. had about the same power at wide open. but definately did not have that noise at 1500 rpm. will see how that guys at work feels. to be honest i think mine had more power down low. it did only have 10 miles on it too. they also had an 05 and an 06 gt40 there. first time i saw one up close. wow to have $175000 to waste!