What crank 1970 318?

All '67 and earlier engines had forged cranks. 318's after 1967 it was kind of a crap shoot. Most automatics and manuals in cars came with cast cranks, but, I've seen a few forged cranks that got installed from the factory. Maybe they ran out of cast ones temporarily and used a forged crank? In trucks, most automatics came with a cast crank, and most manuals came with forged, but, then again, I've occasionally seen them both ways on seemingly original unmolested engines. Also, most automatic cranks were not machined for a pilot bushing like manual trans cranks were, but, I've pulled a few virgin automatics that received a final machining for the pilot bushing. My guess is that there could have been either be a screwup by whoever went to grab a crank off the shelf, or, that they may have run out of the correct one at the time.