I have a '96 Caravan SE Sport with 3.3 Liter V6 and front AC. My alternator is on its' last legs and I am not sure if I have the 90 amp or 120 amp alternator, how can I tell, or does it not make any difference (except in price)?

Check and see if the factory sticker with the part# is still on the alt. Rockauto.com has brand new alternators listed. Price difference between the 2 is about $2.