Megan EZ Street coilover with UAS air bags

[brainneeded]

From what I find they go with an airbag INSTEAD of springs?

bummer, I want airbags WITH springs, in the back only. So I can run 0psi normal, crank that up to like 100psi with it loaded/trailer...

look into cup suspension. its basically an air cylinder that sits on top of the spring that you can inflate to raise the height. it's not the cheapest, but it'll do what you need it to.