Yup. Mopar Performance since it was Hustle Stuff has said not to choose camshafts based on .050" duration too. Right from the beginning. It all still in the latest edition of the MP engine manual. RIght there in black and white about how the .050" duration isn't the best criteria for choosing a camshaft. Now, when you drop camshafts such as the MP cams out of the equation, then the .050" rule levels the playing field more. It's still far from the end all be all though.