To answer everyones comments:
GM came out with the later fan design to improve cooling of the alternator years ago we used to sell it not because owners had issues with their alternator heating up but for the simple reason it gave the alternator a cleaner look and was easier to keep looking nice over the fan style that is on our cars.
Granted not everyone will want it but for $25 its a nice upgrade from an appearance standpoint. While its true you can find them in junk yards. What you need to realize is you also need a special width spacer otherwise the blades will rub against the alternator housing.
The spacer is not the same as the one used on the newer style alternators.
As for our brand new 120amp alternators they are all custom built locally by one person for us and have a full 2 year warranty. Housings are brand new and are as close to looking original as you can expect to find. We can also made 200 amp ones. Richard Clark has tested it and they do crank out 200 amps! The stock 120 amps are all pre tested as well.
We also have original cores mostly 1987s so we can even build you one with the 1987 part number and possible date code you may want.
denniskirban@yahoo.com
We pretty much cover all the bases now for alternators. We also carry the Caspers field fix which we highly recommend which eliminates the issues associated with a bad circuit board or burned out volt lite in the dash which can give the appearance that the alternator is not charging.
Some owners have had bad experiences with various products that jolt the alternator voltage at certain boost levels. This can also leads to problems down the road.
In our research in 1986-1987 our cars were the only GM cars that had a 120 amp alternator.
denniskirban@yahoo.com
By the way our source has even built a special 18 volt alternator for a car that has run at Bonneville flats.
The guy is that good.
The alternator Richard tested peaked at 238 amps which we sell stating it will do 200 amps. It is also the very FIRST advertised 200 amp alternator Richard has ever tested that truly put out 200 amps.
I have no idea what over Buick suppliers he has tested but ours was the first to do as claimed.