“The CIA is asking only for some redactions, not for all the documents to be held, the official said”
There is not a single source, method, or agents name from 1963 that could compromise national security. If they want something redacted, it is to cover up wrongdoing or direct involvement.
Not all the documents date from 1963. Some originate as late as the 90s.
there might be a few still agents still alive.