Tayana V42 questions.
I own an 83 V42 Centercockpit(Wings). Our
boat had extensive cracking around all the ports (and still does). The reason turned out to be that the holes had been originally cut for the then standard Tayana portlights, but then the order was changed to opening ports (which it still has). The surveyor assured us he had seen this before (Hartoft
from Annapolis, one of the best), and that the cracking was between the filler which had been used to fill the gaps and the inside liner. I was never very comfortable with this, so on our offshore passages we covered them with Lexan panels. A few years ago after about 20,000 miles I was preparing it for what I thought would be a Southern Ocean run, and I had one of the portlights pulled just to see what was really under there. The surveyor was exactly right, the only problem was with the liner/portlight gap, so there was no problem, other than looks. We finally just covered them with a teak frame and foam padding, both to make things look better and to reduce condensation from living aboard here in the winter (Gothenburg, Sweden).
I do know of one much older aft cockpit version (late 70''s) that had some serious structural problems, relating to inadequate roof reinforcement. This I believe was fixed in subsequent models by adding knees, so I suspect the 88 model should not have this problem.
Finally, there is one other possibility that comes to mind. The first time we removed the mast after we bought it, it stuck and the hoist guys actually succeeded in lifting
the entire boat from the water. It probably had not come off for 10 years. Such might well have caused some cracking like you describe in another boat. If you have any doubts, get the meanest, toughest surveyor you can find, set him to work. The cost is worth the peace of mind.
Just as final final note, this is one terrific boat. It is heavy, comfortable, but very fast since you can put on lots of sail. Smartest purchase I ever made :-)