Rear Suspension ideas

[steves1967]

I have a 71 3/4t long bed with leaf springs. A few years ago, I added drop spindles to the front and had the rear springs re-arched. The truck sits level now. But it rides like crap and has zero weight capacity. Recently i added air bags to the rear to help with load capacity- but it rides even worse now. The bags are squished all the way together.

I like the lowered look and I want to be able to tow a trailer. Should I ditch the leaf springs and swap everything over to a trailing arm/ coil spring/ air bag setup? Do I 4-link it? I don't want to chop up the bed or frame...