Anyone have any idea how much this weigh's? Its a little over a full cord of seasoned firewood. Theres a picture of it empty, and 2 with it loaded. The wooden crate must weigh atleast 300 lbs. Can anyone take a guess as to how much weight is in the back? The box is approx 4'x8'x5' If i had this in my 1500, the tires would be gone! This truck is awesome!