Well we ended up buying a new truck. We got a different one, but it wasn't working out, so we "exchanged" it for a new one, which just happens to be *almost* exactly what I have wanted for a number of years. (The one I have been looking at is just a newer model.)
Here she is:
Did I mention it's a Hybrid!!!!
I look forward to seeing how far I can go on a whole tank. I do need to make some modifications though. The factory air dam is a little measly.