To add to the confusion about the varieties of "wide five' Brake Drums, what are these "open" 1936 Ford "wide five" Brake Drums? One person told me that they are called "Rocky Mountain" while another told me that they were called "Spyder". Were early 1936 Fords equipped with these "open" Brake Drums? If you have the "open" type on the rear, should you also have the "open" type on the front, or were they mixed? Can anyone tell me the history and usage of the "open" 1936 Ford Brake Drums. Thank you. Regards Mercman <><