And No, this is not the answer. In fact air shocks can do irreversible damage to the upper shock mounts. Do a search, and you'll get a thousand hits on the subject.
Works for us just fine, just a little shot of air keep it from rubbing.
Not the 1960s where people are putting M 60s on them, jacking them up so high they need to readjust the headlights, and carry the whole car load on the upper shock crossmember.
I actually put the short "Big Block Leafs" on the bottom of the original spring stack on my '67 that worked out fine too.