Can anyone tell me what this is out of: Front of axel tube reads KF 04 5B, Back axel tube reads 12346 over 67890 and the back corner of the carrier I think reads CONI , I did not see anything else that looks like a date code. I read the other post but I'm not sure where the bulls nose is located.
Thanks,
John

KF=3.55 66-69 Chevelle
04_5= April 5th,15Th or 25th rear assembly date
B=Buffalo axle plant

The casting date will tell the year cast. Look facing the rear cover for a small raised code at the 5 or 7 O'clock position. Letter for month/day/last digit of year.
Looks like this
http://nastyz28.com/pictures/reardate.jpg

Rene
66_Malibu

Thanks for the info!
John