keel removal o 69` cal 2-30
Most Cal''s have a fiberglass encapsulated keel assembly. There was one model about your vintage that was a bolt on.
Either way, an inspection of the bilge area should confirm which one you have. The bolt on keel is pretty straight forward. The encapsulated trapazoidal type is a fiberglasser''s dream. Lots of cutting and grinding. And the replacement would be a structural engineers nightmare. I have never heard of anyone doing anything but local repairs.
If it is a bolt on keel, check the Sailnet Ranger list archives. Several people have removed and rebedded the cast iron keels on Ranger 26''s (Same manufacturer - Jensen Marine). They described the procedures in detail and a couple even have pictures.
You can also get a lot of info from the Sailnet Cal List on this matter as a couple of listees have major projects on going.