[chev-obsession]

I cant speak on the fusible link, other than I would be running a fusible link over a fuse. Do your research on that part.

I'd have to see how the alternator is setup but you might need the brown (alternator exciter) wire coming from the firewall. If you aren't going to use the brown wire, id terminate the brown wire entirely at the ignition switch... that is where it gets the power from.

As for the ammeter wires, I would make sure they aren't connected to the battery in any fashion and take the terminal out of the black plastic firewall connector (that goes for any wires that you don't want to be using). I would not leave an open end on a cut wire. Terminate the wires where they get their power and verify with a multimeter that they have/don't have power before and after you do your cutting.