Stock suspension question

[R.L.]

I listed this as stock so not to disapoint any of the low rider guys. I have a LWB that I shortned and made a SWB with trailing arms coil springs that ride like you're on a old feather bed, thats nice if the road is smooth but if you're on any bumps it just bounces and hops over them it could get dangerous if your in a turn at speed. I've put new shocks on the truck but they are the light duty Gaberals, my question is can I go to a heavy duty shock that has coil springs on them to stiffen the rear end up; or would it be more effective to go to a air shock? I considered a block to install in the coil springs to take one of the coils out but I'm not sure if that is what I want to do. What do you guys think.