I need to build doors for my truck. I have attached a couple of pictures on what I need and what I have done so far. The original truck is described as a wood cab but I know it has to be partially steel. I want to have the window roll down so I will need some sort of regulator. I can build steel hinges. I have 3x1 and 2x1 rectangular tubing. The main thing that has me stumped is what to do where the window will come up through the "sill".