Aldo, why not buy my blocks and bump stop, then get $15 worth of bolts from Lowe's, and you have a 3/3 kit for about $50?? You can always get the upper control arms later if you want to go lower...
And I seriously doubt there's anyone where who beats their truck harder than I do... I catch a little air 4 times daily, drive 150+ miles daily, and am not happy unless my tires are squealing for mercy in a curve...
Anyway, I had no problems with the stock UCA after the drop.