More updates
While trouble shooting an alternator wiring problem on my 510 with yes, another similar GM alternator, wired as two wire, I have more to add on the subject.
First, I ran across another excellent reference web page that does an excellent job of describing the workings of all the GM alternator variants, and how to properly wire them.
https://www.pirate4x4.com/tech/billavista/Wiring/Part2/#onewire
My initial suggestion/recommendation about using the hotrod oriented 1 wire alternators from Mopac, has, shall we say, 'evolved'
I've had consistent problems with them as they have a non-insignicant amount of current drain when the car is off. They kill the battery within about a week if you don't drive it. Hence I've moved on to the two wire style, where you supply a switched +12 wire to the alternator on the "F" or "I" terminal (right next to 'S') (see above link for very good explanation). The above reference alternator has the same case style as the original nissan alternator, so you don't have to modify your mounting base. A little spacing is about all you need to do. All I have to do is remember which car it's for. I'm pretty sure its a CS130 from the 88-89 Eagle Premier. 100 amp, internal regulator of course. You have to put your pulley on it, they come with a serpintine belt pulley.
These alternators have a four wire socket that accepts a plug. You can get a pico 5657-bp pigtail from your auto parts store or get one from the wrecker. https://picocanada.com/en/view_product/5657-BP
According the above link, the common practise of just jumpering the "I" (or F) terminal directly to the output terminal to excite the alternator is not the best idea. Read the details in the pirate4x4 link and you'll understand why.