I put my box an inch forward, because the springs are longer a total of 3 inches with springs and drop box and 1 inch from a relocator.Pic is to far away but I bolted everything up and estimated how far the the shackle would move back then tacked the box on once I was happy with where it sat. I put the front end together and set the truck on the box and slowly added wieght by lowering my floor jack and left it in place for extra support then tapped the dropbox around until it was centered and forward enough.
