[Yoyodyne]

Very clever setup, I wouldn't have thought of going through the pan with fasteners.
Do you modify the main cap for a seat for the bar, or just have it bear on the spotface areas for the main bolts? Where are the 5/16 bolts located and how are they used?
I'll never do this to a flathead, but I might be able to apply it elsewhere.

Thanks for the description!