If it's been sitting outside in the elements unprotected for the past 6-7 years, then you'll probably want to recheck the condition of the core.
You say the interior all has to be redone anyways, so once you rip all that out, it wouldn't hurt to get access to the drain well at the bottom of the transom, and cut a small hole in the glass laminate to check the core underneath. Water flows to the lowest point, and that there is the lowest point in the hull.
If it's still good, then you can just patch it back up with a couple layers of glass.
Good luck with the restoration.
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