They have flip kits...Dont need to weld anything...Its basically what you have but with the brackets flipped and instead of the brackets holding the leafs above the axle, they hold the axle on top of the leafs...Super simple.

Hey man u flipped the leafs on ur truck?? im tryin to lower the back like that on mine.. my buddies a welder so all i gotta do is set the axle on top of the leafs??