[68c10airstream]

I'm not staying up on the 4x4 threads, but for a softer ride and you would lift it a bit you can add a leaf liner in between each leaf. It should be a slippery plastic liner that looks like a flattened out "H". I did this decades ago to a willy's pickup with a tall narrow stack and changed the truck a lot. Being able to reduce inner leaf friction is a huge improvement. Hopefully it's still available and i believe plastic buttons can be added in place of the liner also.