Have a Jayco Eagle 305 and when hitched up it has a noticable slant towards the rear. Was wondering if I could level it out by moving the springs and equaliser down a notch or two as opposed to flippi...
One, drop pins to lower holes as you have suggested. This will raise the RV. Two, lower your hitch. Three, raise your pin box. Four, any combination of the above.
As already suggested, whatever you do maintain your bed rail clearance to a minimum of 6 inches.