Nice weather, so i started tearing the rear apart today. Sledge hammer and a few taps got the axles out real easy. I'll edit the first post of this thread with the general dimensions/ pertinent information as i get it.
Cover definitely looks like some sort of a modified 12bolt truck....
However, the carrier definitely doesnt (random 12bolt truck pic from the web)
How the pinion depth is shimmed.
Housing end - top is 3-3/4" spread, bottom is 3" spread, top to bottom is 2.5", diagnal looks about 4-3/16"
Quick eyeball of axles says longer side is 33-3/8", shorter is 27-7/8"
axles. three steps - 1.360" by the splines, next step is 1.435", last step by bearing is 1.525". haven't measured bearing surface yet.
Housing - 2.875" opening, .975" deep
And you know what the real kicker is? Only 26 splines. wow....
On the upside, the insides of this definitely look beefy....