Just got a 05 king ranch crew cab long box 4/4 FX4 with CCCC spring code. I think thats 6k front springs and 7k rear. Anyways just wandering if the Bilstien HDs have enough dampening for the truck with a 5th wheel. I ran Bilstein 5150s on the back of my 97 F250 hauling the same camper and they rode really nice loaded or empty. they were the heaviest valving they had 250/70 something like that. Sucks they are 4'' to short for this truck.