The alternator in your link requires an external regulator. You'll need to acquire a 10-SI model GM alternator that has a built in regulator if you want to upgrade. Drop me a PM with an email address and I'll forward a copy of the correct GM wiring diagram to make it work.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!