Purchased this truck (04 Big Tow 4x4) to pull my boat with one week ago. Today was the first time I had a chance to hook the boat up and give it a test pull. I pulled to the ramp just a few miles from the house. Launched the boat and pulled it back out with no issues. Did not have to use four-wheel drive. I'm not sure of the tongue weight but it definitely sagged the *** end of the truck. My question is what would be the best solution to not have the truck sag so much? Air bags, different springs or shocks?