Might sell the F450 and go F550 with liquid springs

I run what the truck calls for on the factory tires. 90 in front and 80 in the duals. I would not run them lower as the stiff sidewalls likely would not be happy. I would like to find some load rated tires with more squish or that reach an expectable load at lower pressure. Then maybe some squish to help smooth our the road joints and potholes.