[Slammed67]

I'd assume that the 4-5" drop they spec is the suspension drop, not the overall drop of the truck. In other words, the new spindle location will be 4-5" higher than stock. I doubt the 4-5" number takes in to account a tire size. Are you wanting exactly a 4-5" drop? Are you going to use stock size rims and tires? I'm not sure exactly what you are asking.