At that amperage I would step up the fusible link.
Never play any games with a fusible link, it is not a fuse to protect your load, it's there to protect your wiring harness.
My Fury was serviced and the mechanic left the alt to battery wire close too but not touching the exhaust manifold. Couple days later, the heat melted the wire's insulation and it touched and welded itself to the manifold. The alternator was feeding a dead short, which if left alone would burn the cable between the alternator and the short and probably destroy the alternator. However the real problem, the battery feeds through the bulkhead connector, to the ammeter, to the master splice, back through the bulkhead connector and directly to the dead short. So all of that wire was instantly overloaded and within seconds would melt and most likely catch fire. By the time you figure out what has happened it's too late the car is burning. The fusible link melted virtually instantly, which disconnected the battery, which killed the ignition and stopped the motor and the alternator spinning. The fix was simple, repair and reroute the alternator output wire and plug in a new fusible link.
That happened while I was driving in the center lane of a three lane street and the car couldn't have gone from running well to totally dead any faster Never screw with the fusible link!
When you install your high current alternator, run the battery lead directly to the battery and install two suitably sized fusible links, one at each end. Why two you wonder, well visualize this. The cable runs from battery directly to the alternator and for some strange reason it gets pinched at the mid point and welds itself to the car body. If you have one fusible link at the battery end it will blow but the alternator will still merrily pump amps into the short and destroy itself. Ok, put your single fusible link at the alternator end, now the alternator will be protected, but the battery will pour all it's juice into the short. So the solution is a fusible link on both ends.
The second thing to do with your fancy alternator is rewire your headlights to use relays connected directly to the battery. There are handy kits that plug into the existing harness so that none of the stock wiring is touched. I forget the name, Big John probably knows. This use of relays to power high current items like headlights, cooling fans, etc. keeps all that extra load away from stock wiring harnesses and makes your car much happier electrically.
