Your more than likely going to have to remove the upper intake to change your valve covers. After the intake is off, the drivers side cover will come off with no problem. For the passenger side cover you might have to remove the heater lines? going to the front of your lower intake. You also might have to remove the alt. depending on what valve covers you put on. If you know what your doing, I say it would take an hour tops, little longer if its your first time.