Micah,
When manual leveling is turned off my 86 has rods to adjust the ride height, too low air is added, too high and air is expelled. Here's a link discussing Newell's recommendation for ride height.
http://www.luxurycoachlifestyle.com/...de-hieght.html
When terrain has dictated, I have manually raised the height and driven with the manual leveling on.
Hope that helps.