santana 22

I have just bought a Santana22 of unknown age (suspect 23 years old). I've heard the keel bolts need replacing on this every 30 years. Can anyone tell me if these keel bolts look like they need replacing?

We have a relatively new-to-us 1969 Santana 22. The early model Santana 22's have a habit of needing additional mast support and this boat has a large metal post installed in opening of the bulkhead. While not looking to go out for a week or so we'd like to have some access to the v-berth (and...