1978 Pearson 23 info wanted

I recently bought this lady. She is in fine shape, on a trailer, and very clean. I have researched all the usual places trying to find what would simply be an owners manual. I have basic owner-questions. Any thoughts?
For one, what about the swing keel maintenance and function?

Sorry, we do not have an owners manual. There is a Pearson Yachts Portal which also contains a forum. Have you reached out there? https://www.pearsonyachts.org/

I’ve reached out to them also. No go, but thanks.