This makes me want to pull out my sketchbook.... but this doesn't deserve to be called just a "sketch. This is beautifully done and looks like a finished piece of art as far as I am concerned. How long does it take you to do a "sketch" like this?
Never thought about doing a custom truck with a service body. That works (no pun intended) well. Gotta love that classic blue-green so many trucks from that era seem to be.