Triangle stamped into head where MP used to do the heart

[shmedley]

Does anyone know who might have stamped their heads after porting with a triangle?
I know Ma Mopar used to stamp a heart on them in the same place.

Never seen one with a triangle. It's a big valve swirl head that's had a bit of work done to it if that helps

57526

57527

[4 l-bodies]

Brad,
I have had a few cylinder heads with the triangle stamped into them. I believe that is a factory thing. FWIW, I stamp all of mine on drivers side of head between the lower bolts holes with my initials and code for when it was ported and what stage.
Todd

[Fox]

i have 2 or 3 with the triangle all are 782