Re: Pearson 33-2 Wing Keel or Pearson 34 Centerboard
I own a P33-2 fin keel (hull #27 iirc), and race on a centerboard version (doing it backwards, I know). I haven't been on the wing keel version so I can't compare.
My hull appears to be partially cored, but solid around through-hulls and along the bottom of the hull (to about 1.5 feet on either side of the keel). I am getting this from looking at the inside of the hull in the bilge (there is a rise where I believe the core starts), and some work the marina did on a through-hull (the area was solid) - but I haven't made a thorough examination.
The pads Pearson used to seal deck penetrations had a limited useful life, so if stanchions haven't been rebedded you might need to do that. Most of mine were fine after 25 years with no attention, but there was one leaking when I bought the boat, and I had to replace some deck core because of that.
Western Long Island Sound