Sway Bars, anyone know about set up?

Hey I'll try and make a long story short, when I took out all the flooded lead acid batterys out of my gem car the car rode so stiff it was a joke. Ya see the car was designed to carry almost 500 Lbs in battery and when I removed that weight the shocks were way to stiff. So I searched around and the only shocks that I could find were some Air Shocks off a Honda Gold Wing. Well they made the ride awesome but they are to soft and they don't make stiffer springs Ect. I have come to the conclusion that a sway bar addition will fix my problem. The car rides great in a straight line it just handles like a desert truck on the road and the lean in the corners is insane. Well this is where it gets tough.
It's hard to find any information because this is like a 1 off application. I was looking for some guidance in trying to set somthing up. Being a complete rookie at sway bars I am looking for some Ideas.

Here is my front end.