Air shocks??

yellowdartdave said
Do not use air shocks !! They put a tremendous load on the weak crossmember at the top and can break it.
If you want to raise the back of the car, get your springs re-arched.

I also have not had a problem with this in 20 + years. Complete BS IMO.

Though IMO, I'd run a good gas shock and call it a day.