My understanding so far is, the deluxe cab (5 window) came with stainless inside door trim, wheels painted body color, and chrome trim on the windshield frame. Im sure there was more to it, but this is what I see every time I find a 5 window, including the larger trucks. Bill is right, there wouldn't be any years where the 5 window outsold the 3 because these trucks were sold for a purpose. People in the south disliked the 5 window because it just made the inside that much hotter. The value of the 5 window is apparent in trucks 1960 and beyond.. there weren't any! Quite a novelty in its time tho!