Just an FYI Shocks do not support weight.
They are designed to dampen the compression/ rebound cycle of the spring to keep the tire in contact with the ground.
Air shocks support weight and are never recommended, They were a band-aid back i the 60s and 70s.
If the rear is too low, replace the springs.
But as Chryco says the front end could need the ride height adjusted.
He is aware of the torsion bars needing adjustments. Plus alignment.Getting done on Friday, weather permitting. Have to trailer it to the shop. Hoping this is the last time I have to get a trailer.
Back in 87 was the last alignment. Can't believe I found this document. Hope it is readable. I sure will give them the information you sent. Thanks !!!