426 hemi engine block casting dates?

Who here on Moparts has the listing for when 426 hemi engine blocks were cast?
I understand that blocks were cast in lots, on certain dates only, throught the production run.
What were they?
Thank's in advance.
Jim V.

Anyone on the morning crowd know.

Here is one.
7-28-69

Another one
1-26-70

Jim,

There have been a few posts by those claiming to have all the hemi casting dates recorded but to date I haven't seen any complete/reliable all inclusive records of such, only observations by those who have recorded casting dates they've come accross.