I agree. Relatively few of the cars listed in the CRG db are known to exist. I track '69s online and at auction; 20% of auction cars and 6% of cars seen on-line are in the db. Every week I add data.
The CRG db was not meant to be a registry. It is a repository of data. It contains information on 272 '69s from dealership records; very few of those cars [3%] are known to exist. I know of three original owner '69s in the area. Have never been on-line anywhere. Plenty of unknown cars out there.
I use the data to re-construct production calendars at both assembly plants. Could use more '69 Van Nuys data: VIN, body tag, broadcast copy date and NCRS if available. PM me, data remains private.