Phalanx

I've installed 4" coils in the rear of my 2nd Gen and I'm in the process of figuring out how to minimise body roll on the street. I currently run without swaybars mainly becuse the the stock swaybar wasnt working well with the lift and was puling the rear of the truck down.

I was about to order Downey's swaybar extentions when I saw these in-coil airbags. Do these reduce the spring rate enough to reduce roll as much as a swaybar? And are they able to "air down" enough to not limit uptravel and take as much as a stock bumpstop?