Date code on a Camaro 12 bolt

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Anyone know where the date code is stamped on a 67-69 Camaro 12 bolt?

[ProdigyCustoms]

On the passenger axle tube, on the front of the tube half way between the housing and end. It is a stamped number, something like BU0321 E. there is also a casting date cast into the center section that is something like B 14 9. If you get me these numbers i can decode it for you.