Little progress as Winter goes on. I did go over to the garage and look harder at the 10 bolt rear end. It's an 8.2" ring gear version out of a Pontiac. The codes indicate it is a 2.41 ratio out of a full size Pontiac or possibly a 2.93 out of a 75. Information is all over the map when it comes to finding out Pontiac stuff. I will be popping the cover and investigating further when the weather warms up and dries out. Original rear end, like engine are long gone.
