Well, I've answered my own question. Found a nice freshly rebuilt starter on an 80's van at the bone yard yesterday, and guess what number was stamped on the case: 1108776.

Even had the correct HD heat shield on it.
Removed the old starter and was surprised how small it was. It wasn't a reduction starter, but it was almost as small with a selenoid about half the size of the one on the 1108776's.