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Anyone know what these stampings may be? They are free-hand stamped on the bellhousing and seem to me to be non-factory unlike the ones found on the pan rail.
Here's the 440 I'm using for my Charger. This is a 7-2-73 casting with the ID boss stamped with J440 HP and below that is 7 12 2. Not sure what it came out of but the original rods were heavy duty and looked like 6 pack rods. It has 440-6 on the casting but don't know if this may have been...