I tried but could not find any in my ratio. I would even take used spicer over anything. Spicer has the setup numbers etched into them. I hit the perfect pattern the first try by using the numbers and a chart i found in an old book.
To this day that was the most picture perfect pattern ive ever gotten and ive done close to a hundred over the years. If i remember right it was Joey Stokes dana 60 front