Holley carburetor date code question.

I found a holley carb on E bay in nice shape and purchased it. This carburetor has a list number of C8Of-9510-D which is correct for my hertz g project car. My hertz g was built 03/01/68. The holley build date is 811 which is 1968 January first week and Autolite tag reads 8AA =1968 January first week. The question I have is my engine block is dated 8A5
would this make the carb build date and engine build date to close to each other.

Thanks Scott

They are not to close both are under 2 months before your cars build date a good place to be.