PLEASE HELP can any 1 identify this rear end

its in an old 1634985 car , 61- 62 gasser The #s are 413 .its written like a gear ratio 5 by where an X would be on an 3 m o P and it measures 52 inches roughly inside to backing plates inside .other #s kind of look like the big nut
3 m o P. 114 engine in it 3.31 has a sideways an X head
c it is on the ground so we do not know if it is a sure grip
please write me if you know for sure or just add opinions to this thread , the big nut is held on

I believe it's a Diamond T but I'm not sure