Those vibrators can be tough to get out. With the old ones, a pair of channel locks will do the job but the new ones have a very thin case and they crumple quite easily. It sounds like your radio has been already restored so I would just go for it. If your trickle charger can only supply about 6 to 8 amps then you don't realy need a fuse. For installation, a 14 amp fuse will do fine. When those radios are first turned on, there is an initial surge of current through the tube heaters because they are cold. For this reason, a fuse a little larger than the working current is used.
