Like most '32 K members, the one in your photos has the holes for both V-8 and 4-cylinder engine steady rods and the transmissions for both those engines use the same rear mount, so it was intended to be used with either engine. It is a later version than the photo I posted earlier, but that one isn't the earliest one either. On the earliest version, the V-8 and four steady rods are mounted in the same outboard position and they do not pass through the center cross member as shown below.
I don't have the book referred to, so I can't comment on its content.