It turns out that I kept blowing my fuse because of the way I had been connecting the wire to the b+ post on the alternator. Due to the small amount of threaded post I had left, I tried to sit the wire directly onto (and through the post) the alternator. I covered the bare metal under it with rubber to ensure that I wouldn\’t ground, then screwed a nut and washer ON TOP of the wire, instead of the normal setup which is nut, wire, nut+washer (broken post).
For some reason that setup was sending too much current(? ) through the wire and would end up blowing the fuse, which would explain the initial successful start with the blown fuse on the retry. I ended up sitting the wire on the nut+washer, with the latter acting as a terminal of some sort. Like how the battery wires sit on a terminal and not the actual battery posts, and temporarily strapped the wire to the nut with an elastic band to keep it in contact with the makeshift terminal.
Ok i have searched and searched. I found many threads and ive tried everything anyone has said. I just got an alternator (and yes the alternator is good it was checked before it went on my car) I put the alternator on and once i go to connect the positive terminal on my battery.
The fuse goes boom! I then realized i am an idiot and left the one wire on the alternator, directly touching the alternator. So i put a homemade plastic washer in the middle. No metal is touching this cable now. Its only touching the threaded bolt. Ok so after replacing the 80amp fuse again.
I put the battery cables back on. It sparks but doesnt blow the fuse(suprisingly) but the second i fully connect the jumper cables, it blows everytime. The only thing i can think of is the jumper cables are the issue. Ive put this cars back together plenty of times. Always done the alternator the same way everytime and never had an issue. So why now? Its very irritating.