Thought it was a dana 18, it may be but I can't find DANA anywhere.
It's attached to a t14A.
There's no drum brake on it.
It's twin sticked.
The tab for the isolator bushing does not have a mating surface for it to attach to the cross member.
It's full of oil and does not leak.
Brown Lipe, subsidiary of Dana, made these early on and would have had a tag riveted to the top. 1 1/8 intermediate shaft. Will work fine until it doesn't.