I have the same truck as you sans the 3500 springs and mine is a 93. My truck rides just fine with 2500 springs in it.
Why do you have 3500 springs in your 2500? Overloaded?
You need to get total weight for the trailer and put about 10 to 15% on the tongue. I like to have about 15% on the tongue because the closer I get to that number the more it will handle like a slot car on back of my truck.
Move your tractors around when you go to the scale and get it weighed several times.
I have had 1 ton in the back of my pickup many times and it handles the load just fine.