keel removal o 69` cal 2-30
As part of the Sailnet Lists, Sailnet maintains an FTP server for the lists. The Cal list is one of the most active lists (too active for some). Their ftp site has many scanned images of the original owners manuals, drawings and equipment. Try pointing your browser to ftp://ftp.sailnet.com/Cal
And rummage around, I think you will find what you need.
The fact that you did not see two rows of nuts, only the steel loop, would lead me to believe yours is encapsulated. Removal would not be prudent. There are major laminations at the keel root which would be involved. Also, this model Cal has a steel beam located athwartship under the forward bulkhead. It and the bulkhead itself have been subject to much rot/corrosion, necessitating major surgery. It is critical as the rigging loads are transferred to the hull by these members.