I am wondering what your fear is in a weight higher than what the vehicle is rated? Is it for your every day driving safety or others you may or may not have an accident with? I would be more worried about steel bumpers on any truck that a lawyer may have a field day with more than a vehicle being overweight. Modifying any vehicle puts you at risk because thats not how the manufacturer intended it to be nor was it tested like that. If you are worried about a vehicle being over the tag weight rating then buy a "weighted" tag so a state trooper cant say anything if the truck was ever weighed.
Ben
For one not even liability insurance will not cover you if you over weight, so if you cause a 3 car collision while on the roadway in route and they all happen to be to brand new Range Rovers you are skewed for the rest of your life of all forbid you kill somebody it is all coming out of your pocket... Yes the chance is low but it has severe consequences if it happens. See that isn't much of a problem here in Africa.
That is your biggest fear. Sure a fine would be cheaper than operating a larger vehicle within it's limits...