You tell me.... 340 X Heads

You tell me.... 340 X Heads

I have been told by a member or two on here that I do not have X heads. My car is a 60,000, Formula S, 340, 4 speed.

I DO NOT HAVE AN X NEXT TO ANY SPARK PLUG HOLE.

Well today I pulled the valve covers and here is what I found......

pass side

casting number... 2531894-1
other numbers..... 340(something ground off), I found a small 1 2 3 also cast into the head.
Date code 9-4-67 (as cast 09047) (would be correct for my cars build date)

drive side

casting number... 2531894-1
other numbers..... 340 AAWJ, I found a small 1 2 3 also cast into the head.
Date code (ground off)


So one head has a date code and a removed AAWJ after the 340.
The other has AAWJ after the 340 and the date code removed.