I think I understand your request, but do have a few questions:
USA vanity callsigns change, some hams move to new QTHs but keep their old calls, ARRL changes Ontario VE3 section bouindaries, etc.
Do you have sources for all the missing details that are accurate as of the date of each legacy QSO? If there i cosnflicting information, how will you decide which data source is correct?
Karl WA8NVW OH