489 8 3/4 Third Member Sure Grip?

As I suspected and you guys confirmed, it is a cone type. It seemed from the picture the case bolts went in from the ring gear side but I wasn't sure. It's claimed to be out of a 1972 Imperial, 3.23 ratio.

it appears from all my reading here and elsewhere that the case dating method is not consistent if there even is one! Still awaiting ring gear date stamp from seller.

Good discussion, thanks for all your input........