air bags or stiffer springs?

[BeenChevy]

Those are 4"x2"? If so, may make more sense to install what I did in your stock location and then add more to the BDS axle stack. They'd fit the stock location are 4" diameter and about 5.5" tall. Been looking getting some of the leaf spring ones for the trailer after looking into them more..

 

[gmartin1215]

Those are 4"x2"? If so, may make more sense to install what I did in your stock location and then add more to the BDS axle stack. They'd fit the stock location are 4" diameter and about 5.5" tall. Been looking getting some of the leaf spring ones for the trailer after looking into them more..

View attachment 392451

The specs for the builder springs are 4" diam and 5" tall, plus spacers.
But, your suggestion could work too if I can figure out what to use to stack on the axle bracket. Without something there, I am still going to have a about 3" gap with the Sumo replacement.