I tried to find some plans/drawings for this locomotive, but found nothing - except 2 or 3 old photos. Otherwise, I am not very familiar with American rail system, terms etc etc, maybe I didn't search the right thing - the idea is that I build myself the card models that doesn't have a kit already done. A ruler, a sharp pen and eraser for drawing on paper (or a pc with MSPaint and a printer) and, of course, a minimum of info from a plan or sketch. There is some work doing this way, but patience is a virtue of a modeller, right?
PS - Now I got it! Here is how a guy build this model and a little sketch that might help you. Good luck!