I believe stock 01+ alternators are as follows:
Manual trans = 95a
Auto trans = 105a
Explorer 4.0 alt = 130a
You should be just fine the way you are....I always was when I had those 4 130w KC's wired up and the heads and fog hid's running. It all really depends on the KC's....what wattage and what kind of draw they have.
'01 XLT disguised as a '03 Fx4 Level II.