I have considered this for the rear of my truck, but want things to look more traditional so I am going to use air shocks.

I am still early in the build stage so this is not all worked out yet. What I plan on doing is de-arch the rear springs and remove enough of the leafs so that they will support the truck at a height a little lower than what I want for ride height. This way I should be able to bring it up to ride height with the air shocks and have a small load capacity. The springs will be pretty floppy so I plan on a sway bar in the rear. Well that is the plan for now, not sure how it will end up.