Quote: i don't know if this is 100% true all of the the time but the few i've seen were marked 440-6 on the flat area in front of the drivers side head area.
Back in the day, I was the second owner of a '70RR 440six pack and it did NOT have the "440-6" stamping. I remember this because someone looked at it one day and tried to tell me it wasn't a "real" -6. I still to this day know the original history, the original owner, and had driven the car soon after it was new.
