Here is the left case for my sears motor. It is pretty unconventional when compared to a set of pan or knuckle cases. There are two sets of flywheels in a spacke engine, go to www.pre1916scramble.blogspot.com to see some pics of my bottom end.
These are the shafts out of my friend Marty's top fuel motor. It made 800 horsepower. He kept pulling tapers, so he made up these hex shafts, and cut hexes into the flywheels with an e.d.m. He couldn't true the flywheels, so the machine work had to be 100 percent accurate. This is a cool idea that I plan on adapting to the sears.