Even if you go to new springs, I'd strongly recommend adding the inside the spring air bags. They give you the option of fine-tuning the ride height without having to run high pressure air shocks, and they can be dropped down to minimum pressure when the extra load-carrying capacity isn't needed. Most air bag manufacturers recommend a 5 PSI minimum pressure just to keep the bag inflated a little to avoid creases. That diamond plate will act like half a load of cargo all the time- - - -it softens the ride, but it also works the springs pretty hard.
Jerry
