I'm not aware of anything wrong with the three quart version. I just looked and I could have fit the longer (16 inch) version in front of my passenger seat.
Another thing I thought of just now regarding this discussion (which may have been forgotten or shuffled to the back row) is the significant advantage of dry sump when it comes to performance. Vacuum on the engine and little or no parasitic loss from windage.
The Dailey system is looking better to me all the time. So clean an install.