Thank you for your reply. I had also sent an email to the Brewer Design company when I posted this, but have not yet received a reply. I also may try, if needed, to contact the Taiwan builder who still appears to have an operating company.
My concern was for the strength of the hull and decks with a cored aged vessel. The issue of possible de-lamination of the glass from the core material would be a concern, not to mention water osmosis into the GRP below waterline that I’ve heard is common with Asian boats of this vintage.