i tried at a mopar forum, thinking it may of been an amc jeep rear but it wasnt. and i cant find anything on it. my dad had bought it many years ago as a spreader, it is a 6 lug as well.
here are pictures.
http://img.photobucket.com/albums/v1...21/misc003.jpg
http://img.photobucket.com/albums/v1...21/misc004.jpg
i have no clue as to what it came out of..