I had air shocks too but took apart some springs months ago to fix mine.
I found it on another thread. Here was my info.
Here are my Cheap MP XHD Springs- Bent Backwards
Left one
Right One isn't so bad because the second spring is closer to the eye. But if the left one is cheap metal, the right one will be too.
Side view--TOO LOW, no air in the shocks
Got some B-body springs, friend said "same length". I found out 1" too long. Here spring and rear shackle is bottomed out on bumper guard.
CAR SITS TOO HIGH.
Pulled my 2nd leaf out of a set of old E-Body springs and installed them on another old set, right below the second spring.
Now cars sits level where I like it.
Here it is without any air in the shocks.
After swapping the springs out twice over 2 weekends, I think I'll paint them later.
These wheels are 15x10 with a 295-50 tire for sizing in the pics. B-body rear, springs moved in 1"
I'll never tell anyone to buy Mopar XHD springs.