Looking for info on lowering a cab and chassis
 

I have a 98 6.5 cab and chassis, the frame and rear axle are narrower than a normal dually or so i'm told. I'm looking for a drop that allows me to tow trailers and still work it but look good doing it. Where can i find a lowering kit for this truck, do they make one, is it the same as another truck, any help will be appreciated