You can have any spring pack re-arched. You are still limited by the compression of the spring and how far the travel is for your shackles.

One of the things I didn'tlike about the stock leafs (leaves?)was the thick overload spring. I seemed too stiff if you were loaded up and hit it.

I had a custom set of leafs made that gave me the lift I wanted (with stock shackles) and the load capacity that I wanted. The company (National Spring) wanted a stock set of springs to figure out what to make for me. The whole process only took a couple of weeks including shipping to them and back to me.

I also had them do a military wrap on them.