I bought a set of the Mono-Leafs and one snapped in half on me on I-80.
Tore up a brand new tire,sent me to the right lane in a hurry, and cost me 120.00 to have the truck towed home. The "truck parts place" in California reimbursed me for everything,, but no more mono-leafs for me.
Your best bet is a drop axle www.droppedaxles.com or de-arch your springs and remove a few leaves. Thats what im running now.