One thing for certain, and this has nothing to do with scales and everything to do with the driver.
If you feel unsafe, you're too heavy ... when your load is too much for the truck, you'll know it pretty quickly. The truck will tell you in no uncertain terms, because it will be hard to control and will not respond in a way you want - and your knuckles will turn white.
Regardless of Specs, Weights, Axles, Tires, Brakes - if you can't tell by driving it whether it's safe or unsafe, then you got no business driving it.
