What's the amperage capacity of the alternator? One fuse link, between the battery cable connection at the starter, and the ammeter, is all that's really needed. Any other fuse of any type in the main charging system is simply a "belt and suspenders" approach to electrical circuits. The only purpose of a fuse, or a fusible link, is to protect the wiring harness in case of a short. The fuse link should be able to carry the maximum output of the alternator, plus about a 10% overload. If you've got something stupid like a 100 amp alternator, that's going to mean you need to rewire the entire alternator/ammeter/battery charging system accordingly, with 6 or 8 gauge wire and a 125 amp fusible link. That's ridiculous!
Jerry