Decoding can be confusing... and Chevy and their suppliers used interesting and varying systems of id...
You have to read the chart all the across on the CRG Drivetrain Decoder. The 69 #s are in the right hand columns. Look here:http://www.camaros.org/drivetrain.shtml#AxleCodes
Colvin verifies Kurt's decoder about 69 PC axle on page 314 of Chevrolet By the Numbers, 1965 - 69.
Thanks for what you and all CRG do! This thread made me go back and re-read your decoder info. again. I learned quite a bit!