Dana?

In my never-ending quest to annoy the FABO community to death, I have yet another question. I was perusing the local do-it-yourself junkyard and happened upon a massive 1971 Dodge van. I coudn't find a model name on it anywhere, but it was definitely not a passenger van. Anyway I thought, "Hey, maybe it has a Dana." and took a peak between the wheels. I found a differential that was octagonal, had 12 bolts in the case, had a drain plug in the rear cover, the driveshaft entered towards the bottom and was offset towards the passenger side I believe, and the cover was not smooth like a 8 3/4 it was more...humpy. I couldn't get to any of the casting numbers on it, so hopefully this data is sufficient. Is it likely that it is a Dana? I've been looking for a page of diffs that I happened upon a few days ago, but I can't seem to dig it up.

Thanks