like said above, a better test may show more as to what is going on or what has happened. my gut feeling is that something internal has shorted and cleared, shorted just long enough to cause a high current spike to blow the fuse......now the alternator is toast. look for an alternator rebuild shop, as well as testing it, they may be able to find what component or components failed, it may be repairable.
..5.95 @ 115, 1.30 60', naturally aspirated.
1991 notch, dart block 427W, , AFR225's, super vic intake, solid roller, UCC 8" converter, glide, Carbureted E85, 28" radial.