[69L72RS]

I need some help on an axle stamp.
Does this stamp look real?
I thought this date was too early for an LS6 car. Is it?
The center is cast L-?-9.
The rear has a yoke for a larger u-joint. Is that correct.
Should this rear have the 3916234 carrier and the 3917971 4.10 gears?

And lastly, what is this thing worth as a trade in?

Thanks in advance for your help.

Eric