Well one of the guys I work with took a new 6.7 for a test drive. He said the truck rode very nice but it wandered back an forth between the lines on the road. He said it ran well but did not feel as strong as an lmm duramax at work, but when he started it he could have swore he was sitting in a Duramax truck had he been blind folded cuz it ran so much the same. He also said it looked a lot like a Duramax under the hood. The salesman tried to give FORD the credit for pioneering the aluminum heads??? I really want to drive one but dont have a good enough excuse to ask for a test drive.