My brother gave me a pair of single leaves(springs)he removed from a Tahoe. They are quite a bit stouter than the individual leaves on the 'bird. I removed and replaced the second leaf from the bottom, keeping all others. This put my rear right where I wanted to be with no assist from the air-shocks. We'll see if she settles down over the next several miles. Can't beat the price!! And it was an easy project.
Also, while under the car, I noticed (duh!!) that the bottom leaf on the 'bird is a half length leaf, only projecting forward from the spring shackle. Is this correct?