The original Bishop/Tardel book uses the 59 series engine for the compactness of the frontal accessories and allowed them to more easily use a belt driven mechanical fan. I've heard that there is a newer 3rd edition out now but haven't checked it out. The 8BA frontal accessories have a bit more length in the water pump sheaves to clear the more modern distributor used so this can be more difficult when you are fighting for space in that area.