Martinjmpr
Wiffleball Batter
This is all theoretical until you weigh the truck. First step: Load it up, take it down to a public scale, give them $2.50 and get a slip of paper that shows exactly where you're at. Scales are usually located at truck stops, steel yards, landfills, etc.
Once you have that number, see how close you are to GVWR. You might be surprised to find that you're still under. Bottom line: You don't know until you measure. You can also get front and rear axle weights done for a bit more.
Arclight
We have a local sand/gravel place that will give you a weight for free if you don't need a "certified weight" slip. If you do it's like $4.00. If you have a place that sells sand or gravel they might do this for you too.