Freqman1
Riding a '37 Dayton Super Streamline
My take is....
If you cut at the bottom to keep the correct height and to keep the short straight piece at the top, the taper of the girls bike is longer and you will end up with a too small diameter to work with at the cast yoke.
I think this is why a shortened girls DD fork is cut at the top thereby losing the short straight piece.
Here is what I'm talking about. V/r Shawn