So your thinking that the original motor with the bad crank I disassembled and cleaned up may be a 2 speed noi with single speed parts? The case carter area is in fact unique in size to each crank.
I did not know that there was a two speed NOI configuration motor. I just thought that the two speed was the vertical cylinder VIP . I need to take more pics of the other cases and post them.
I will go to the shop and get some more pics, Many thanks for your help. (edited)