What type boat and where are the rivets located.. are they under the front deck?
If so the deck will have to be removed for access to shot solid rivets or you will have to use blind/ Cherry Max rivets and sealant. Hopefully here are no tears in the structural angle that forms the keel seam.
I know a thing or 3 about replacing rivets... and am currently working at Gainesville Airport.. not far from Moss Lake. If you want to bring it by for me to look at give me a holler.

