I have a mid 60's FJ. It has a large blob of foam (looks original) in the forepeak. It fills a majority of the forpeak area ahead of the mast. I have never swamped my FJ, so I don't know how it would float. One thing that bothers me about the FJs is that there is a lot of area under the cockpit sole that is not accessible. I'm thinking of filling that with foam.