The Patsy Coleman is one of the towboats of the Crounse Line that inspired the Vac-U-Tow. The following detail photos of the Patsy Coleman are courtesy of Towboat Joe.
At Joe's website, you can see him building a Vac-U-Tow kit. http://www.towboatjoe.com/
Details include the pilot house, bow deck area, an emergency fuel shut off valve used when the boat is in danger of sinking to prevent fuel leaking into the river, as well as two other towboats of the line, the Jincy and Sandy Drake.