On my 1983, there are some areas where aluminum plates are sandwiched in the deck layup - i.e. around the mast and at the end of the cabin where the mainsheet winch is located - not sure about under the staysail traveller, but I would guess 'yes'. It is easy to drill and tap these areas; I did so for my boom vang installation, which probably sees as much load as the staysail traveller.Certainly something that will be inspected and modified as needed if I decide to go ahead with the change. The raised portion I'm assuming has a wooden block under the fiberglass that the track is screwed into if I'm following what your saying.