Alternator started sparking

I could not suggest one over another, but the more OEM it is the easier it will be to wire.

Regarding the bulkhead connector, most of the connections are not taxed only the main feed and battery feed are. Those two you could bypass around the bulkhead if you plan on new high current electrical devices being added to the car.

If just stock not needed,

Tighten up the metal contacts, replace any that are bad, a d you are good to go for another 50 years