manual vs Automatic crankshaft

No they are not the same at all. The manual transmission crankshafts are drilled much deeper to accept a bronze pilot bushing. The automatic crankshafts are not drilled near as deep. They usually require you to trim about 3/4" off the end of the input shaft and also require a different style pilot bearing that presses into the crankshaft register. Normally, forged cranks are drilled for the pilot bushing and cast cranks are not. Also, the cast cranks generally cannot be drilled because you will run into the oil passage as the crank is made completely differently from the forged crank. That's why the input shaft has to be trimmed and the different style pilot bearing must be used.