I have a rearend from a Chevelle I think. Here are the numbers.
On the tube the #'s are KF0831B
On the Carrier the #'s are on one side GM7 and on the other they are
NF3917124
If you can help I would appreciate it
Thanks Ken

My book says that KF means a 3.55 large ring gear with positraction. It should be a 12 bolt.