Is this per chance a hurricane boat, freeze problem or fixed under insurance by the previous owner?
In any event, if it were my boat I would do four things:
- Engage a yard that (re)builds large FRP boats and solicit their advice
- Always support it with at least 5 big keel blocks
- Lift it at the correct strap points
- Grind out the stress cracks, about 12" wide (the yard may elect to go more) and put in more mat followed by gel coat and fairing
Stress cracks on the hull are not good, topsides is a different matter. Mainship/Luhrs was going though tough times then and no telling what maybe/maybe not happened as they cut corners to stay afloat