iron, (maltese) cross

On the subject of ODD Stampings............What does a Diamond on a 440 ID Pad mean?

I have a 66' 440 Block with a <> stamped on the ID pad....it came out of a 66' Chrysler Town & Country Station Wagon....had a dual snorkel air cleaner with TNT 440 on it.

BTW I want to sell all of my Big Block stuff if anyone is needing good cores for buildups.