bbook, Thank you for the link. I ordered a copy.
Ol'Ron, I couldn't agree more. I found that out a few years ago when trying to find out the weight of a boat. Actual scale weight of the boat was way more than advertised. For the truck, there are two scales a few miles from home that I'll try to use in the spring. For now I was looking for a rough idea for something I'm working on over the winter.
Thanks to all for the help and information.