I ordered custom Alcans which took about a month to get and about another month to get the time to do the install. I ordered them with 4 inches of lift and stock carrying capacity. They also included a torque spring to make sure the axle wrap went away. These things are soo buttery smooth. It's awesome. Vibration and Driveline thunks are non existent. Bumps in the road that were harsh and I could feel the bumpstops hitting on occasion are now taken with ease and no ill shuddering from the truck. All in all well worth the $600 investment. This is how the lift should have been done from the start.
Stock Leafs with 4 inch Block
Stock vs Alcan
Alcan ready for U-bolts
Straight off the jack stands. It has settled to near perfectly level.