My '51 3600 has a flatbed which I suspect weighs more than the standard bed. That said, for years it road Great. I'd run about 30 lbs of air in the rear tires to help soften the ride. It just soaked up bumps and pot holes.
Then....I installed overloads. The ride went all to heck. Unless 1,000 lbs or so is riding in the flatbed and then it's pretty good but not as nice as no overloads. Plan is, if I take it on a trip again I'll spend 30 minutes or so removing the overloads and enjoy the soft life again.
So, if your truck has overloads and you don't use it like a 3/4 ton truck, take em off and lower the rear tire pressure a bit. You might be surprised.
RonR
