Old arch top guitars usually need a neck reset to get the action manageable, and I would try doing a search for old Epiphone archtops to ID what model it is, then try finding period correct hardware (bridge and tailpiece) You can get pickups that attach to the end of the neck where you don’t cut a hole in the top and the controls and output jack will attach to the pickguard (neck pickup only for smooth jazz tones). Good luck !!!