Alternator Options

I need a higher amperage alternator, I'm going with fuel injection, electric fuel pump, and electric fans, so there is a need for more amps.

What alternator would you use, upgrade a Chrysler square back alternator to 100 amps or so or use a later Chrysler built 90 amp alternator with the plastic back? See link for more info, (bottom of page):
http://www.allpar.com/history/mopar/electrical.html