Over weight? Does it bother you?

I've been hauling for years over my GVWR on my upgraded 1500. Bone stock it would never have hauled my enclosed trailer safely, but it does as it sits and I've never had an issue. My dually has a GVWR of 10k which is a joke. The chassis cabs got a 12k rating with nothing more than a different transfer case and different upper overload leaf pack. The RAWR is 7500# and the axle's true rating is 8,600#. With the camper alone, I figure I'm at or under that and with the trailer and camper I'm likely north of that, but not astronomically so. I'm certainly south of the 12k+ the wheels and tires are all good for. The truck handles the load just fine. While it doesn't have 1000# of torque and a 10 speed tranny like the new new, the 600+# of torque from the Whipple gets the job done in OD most of the time and the temp gauge never climbs even in the dead of summer. The truck is stable and it stops well, so why would I have reason to believe I'm overloaded? GM intentionally slapped a 10k gvw on this thing to avoid it being a class 3 truck plain and simple. That's the thing nobody's brought up yet.