Did the original poster claim they were 20" lift springs???
The photo is too fuzzy to tell, but there look to be about 12-15 leaves in those spring packs and maybe only about 3"-4" of pack thickness. They look to be custom-made are are probably a LOT softer than you realize.
My 4" springs from Alcan/ORD had something like 9" of free arch before I installed them....I was convinced that they'd built them wrong when I first saw them laying on the ground. But with so many thin leaves, they totally flattened out with the vehicle weight on them and settled to a perfect 4" lift.
I am willing to bet that those springs are maybe an 8" lift spring (MAX)....look how close those spring eyes are in that photo. When installed, those springs will be flatter and those eyes will be more correctly spaced.