My Boats an '84. I don't know about the cockpit i think that's pure fiberglass, besides that everything you stand on is cored with 1/4 inch ply including the hatches and sliding part over the pop top. The top deck is 2 flat pieces like you would buy at Home Depot. There is a seam right down the middle where moisture just followed right down on mine. One of the mast step bolts goes right through it. So make sure its sealed.
There should be a metal battery strap under the dining room seat. I believe that's the original spot. My electrical is a hack job. the main wires to the panel are missing.
I took all foam out and disposed of it as it was soaked. I'm going to look into some kind of inflatable solution. Maybe like those pool pillows that are used to hold up pool covers. Could deflate it if you needed access. I might just get better foam.
The bilge pump is basically next to the keel bolt. It has a tube that runs back behind the winch and empties into the cockpit. When it gets done doing its job it has a hard time pumping strait up and out. I might change that. That area next to the keel bolt is the lowest spot in the whole boat. Actually a little bit further forward is and any water that gets under the floors goes there.
I bought this boat as an experiment and to get experience on costs and to learn how to do repairs and learn how things work. I didnt know anything about sailboats or boat building or repair going into this so my cuts and repairs are newbie repairs. top deck seems solid like new now though.