Go back to who, what, where you got the alternator from. I would NOT put that much alternator in the system without making DARN sure the wiring is up to snuff, MINIMUM!!!:
1....READ the Mad article and perform some sort of ammeter bypass
2....Take apart and check, repair the bulkhead connector and consider upgrading the wiring
3...Install a FUSED protected charge wire from the battery to the alternator