318LA Myth's still being created!

I think you're probably just about dead on with perhaps the only exception being 318 truck cranks. They were similar I believe to the 400 cranks used in manual transmission trucks. Those were steel cranks right up until the 400's demise. I traded for a virgin 77 400 years ago that was a truck engine out from in front of an NP435 and it had a factory forged crank.

Glad you mentioned this RRR, never understood the mis-information the factory put in the "bible" The Direct Connection books in the late '70s, and into the '80s. I mean if the DC guys didn't understand crank usage what chance did we have? They claimed ALL late 340s, and ALL 400s, late 440s, had cast cranks. We know different today!
And I'm sure I've got one of those pontiac cranks!