So, I went & wire brushed the rear end & found this stamped on it.
N K1224
Not sure if the "N" is part of it since its spaced kind like the way I typed it on here.

So what I'm trying to find out is what the gear ratio of this rear is.
I got it off of a 54 GMC Hydra-matic open drive.

Any info appreciated
Thanks
Javier