Trying to put my 46 Ford back together after 18 years and I have too many of some parts and not enough of the ones I need. I am trying to figure out what the length of the rear door channels are and witch one goes where? I have one original front window that still has a track on it. Track measures 16" and the holes are 7-7/8" center to center. Do the tab mount to the inside of the car or the outside? As for the back doors..... I do not know what goes in there? I may have one but I don't know. Please help... Thanks, Dave Photo of the other front channel.