Hi James
The engine has a boss and peg arrangement as shown. The measurement from the crankcase cover to front of the crank tube on the cross member is 10", the tube having an inside diameter of 1"
Given the engine seems to sit a lot lower than the original, I wonder if the cross member is off the 1934 car that donated the engine and box, as the tube does line up with the crank boss.
Thanks, Barry