Air Bag Question

[Ellis]

The 1969 Chevelle I recently bought has air ride bag suspension in rear, the former owner only added air in bags when he had 3-4 people in rear seat while cruising, or to lift rear for show, my question should air be left in bags and does air in bags interfer with shocks and springs, and what pressure should be used when adding air. I have no info on proper use.

Thanks Ellis