Upside Down Brake Assembly?

["Mike H." <twobeaners@earthlink.net>]

Hi List, 
I've read that the rear brakes can be a pain to bleed, and I agree. However, on 
my car, the brake cylinders are located on the BOTTOM of the backing plates and 
consequently, the bleed screws are on the lowest part of the cylinder. Every 
diagram and manual that I've looked at shows the cylinder located at the top 
and the adjuster at the bottom. My '67-1600 has always had cylinders at the 
bottom. Is it possible the whole assembly is upside down? 
Scratching My Head. 
Mike Hudson '67-1600