Andrey, here’s a suggestion.
Why don’t you contact the webmaster to see his response to having a separate section in the website. It could be worded something like ‘vehicle archive’ or ‘model registry’. The photos could be a starting point with information (= whatever agreed) added about the vehicle (being as complete as agreed e.g. using a template). This could be amended by the forum user, including past/current owners, registrars, archivist, just as the website Wikipedia does – this would automatically show the amendment date, so future researchers, of a given car, would know if it was up-to-date information or years old. This section could become be a valuable resource.
If this has extra costs to the club, needing approval, then the idea put to the ACOC Council. If rejected, then consider a separate website.