That could be Steve.
I was told there was an overlap that started in April as newer 010 blocks started casting the same month as inventory of 618 blocks were being used up. I have seen May dated DZ builds using 618 blocks, and a few April builds using 010 blocks? I guess that overlap was prevalent depending how the rack rotation was handled throughout the month of April at the foundry and on the assembly plant floor. Info on CRG tends to support that as well.
I'd take either as long as the pad stamp is legit.
