65 Original Radiators

Hi all you 65 owners,
Do any of you still have the original radiator?
Can you please inform me what the embossed
markings are on the upper tank of your car.
C4ZE Y2 or G2 or Z2 or something else.
Date code 1 65, 2 65, 3 65 etc. W-MO
Please include your Shelby serial number as well.
The reason I am asking is that my radiator
has Z2 dated 3 65 and I like to know if that's
correct or not. Car left San Jose' first week of
May 65.
Anybody know what the different Y2, G2, Z2 etc means?
Thanks for your help.
/Texas Swede

 

Thanks Dave,
You confirmed what I suspected.
5S266 also have G2 but dated 3 65 which is what I
probably should have as it's only 9 cars between
the serial numbers.
Anybody has one?
Texas Swede