well w/e i think the blocks are ok, we aint driving 500 horsepower vehicles... i dont want to hear any negativity.!

 

im running blocks too.. there is really NO WAY for those blocks to slide out they are like tounge and groove they have that nub like whats on the leafspring and factory blocks.. they fit like a glove and when you tighten down the u-bolts nice and tight it has no way of slipping out.. i know if 5 inch sus. lift kits with 5 inch blocks was to dangerous then they wouldnt produce them and make it street legal.. i think a 1.5 inch block is fine for the back

 

If you read about the lift kits it says on them that they are for light to moderate offroad use.