Unless you plan to run a huge sound system you've got twice as much alternator as you'll ever need. A 55-65 amp unit would have been overkill- - - -100+ amps is bordering on "Forrest Gump's Mama" territory. Just forget about doing anything with the dash ammeter- - - -there's an easy fix but nobody in the past several years on this forum has been interested in doing the simple modification that would solve the problem for good. Buy an aftermarket voltmeter and hide it somewhere like under the hood or inside the glove box if you think you've just got to have something to look at to convince you the battery is getting charged.
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!