yea you can i have a bds 6" and i could have left the stock block out to make the truck level our put it in like i did to make the rear higher....but i could have used an even taller block to make it higher yet....just dont stack blocks on top of each other....since you used just blocks i would recommend the traction bars the taller blocks will put more stress on the springs and make even more wheel hop....i got mine on ebay bran new for like $280