casting date on pumpkin

[yellow12bolt]

I found the CW 0 6 11 B code on the axle tube of the rear end, found the casting number for 65 12 bolt, but where is the casting date. On the old vettes they are easy to find, but am I totally blind on finding the casting date? I guess I have more grease to scrape but need a pointer on where to look (new to chevelles).
-bob

[DaleM]

It's in one of the two webs on the back side. See http://chevellestuff.net/qd/generic_rear_axle_info.htm for some examples. Some are on the left and some on the right.

[yellow12bolt]

thanks!