I am putting a bumper and winch combination which weighs almost 400 pounds complete. I know it will pull the front end down and have been considering either Bilstein 6112 or 8112 shocks up front set on the highest setting. I will need heavier weight springs though and am having a hard time figuring out what they need to be. I have hears of 800 lb springs but cannot find them 700 lb is the heaviest I have found any suggestion where to look for help? I am going to lift 3 inches also so probably use a spacer on top of the Billies.