Chrysler LA / NASCAR 355 cu. in. crank shaft

Going through other things I purchased in this lot.

A second crank I am curious about.

steel crank, PES 2713 stamped on front counter weight.
Substantial material has been removed.
8-78 date with "945" on second counter weight


And then, also, a third crank. This one came securely packed in a wooden box.

No markings other than a "M" on second counter weight. Possible date of '74? Hard to see. Very clean, looks new.