Flywheel is from a Ford 300-6, 11" clutch, and yes it all lines up. The Ford pilot bearing is a very snug fit into the hub of the Mercedes crank, and I had a bushing made that goes between the pilot bearing and flywheel so it's all centered. The six holes in the Ford flywheel mostly match up to the Mercedes pattern, and I am going to have the flywheel drilled for the other six.
This is what's in between the engine and transmission:

I need to cut away the area the starter bolts to still, but all the holes are drilled and tapped.