Report on Progress so far: We decided to build our truck within all the Federal & State regulations, along with Ford's instructions in their extensive Body Builder's Guide. In short, you can't believe all the stuff I had to study, including analysis of the center of gravity, braking distances, weight distribution, heat sheilds, electrical/lighting requirements, and a dozen more details that are like researching the New York City phone book . . . long and BORING.
However, we've extended the chassis and begun building the box frame. Because I'm actually cutting all the aluminum for our welder expert, I had to totally rebuild my chop saw and miter saw, but that's all done now too. Here's a few more pictures showing the chassis extension and front half of the box frame.
The remainder of the structural aluminum is shown as well. The good news is that, based on what we have so far, the entire box frame (without the skin & door) should come in @ 500 lbs. or maybe a bit less. This is better than we hoped and hopefully keeps us below our target weight of 6,000 lbs. empty.