my 5.5 blew a bow tang (thanks again for the tow in Mike)

I had already broke a side tang a few years ago. we were able to access it (both hulls) without removing a decklid (thanks again mike for the help w that job)

I already have the bow tangs (thanks again mike for getting me a set fabricated a few years ago), but need to remove the decks off my mystere 5.5 and replace both bow tangs

what's the preferred method and tool(s) to minimize deck trama?

All suggestions welcome

THanks!