5S-FE MK2 Non-Turbo Engine Alternator help!!!!

5S-FE MK2 Non-Turbo Engine, alternator, bigger, motor, bracket, replaced, bought, pulled, recently, ordered, steering, power, 100amp, exact

I have a 91 n/a with power steering and my alternator recently went out. I ordered a 100amp alternator for my exact car but it is bigger than the alternator i pulled out. It looks exactly like the old one but is bigger and does not fit in the bracket. When i bought the car the motor was replaced with a used motor and i dont know what car it came from. Can anyone help me with this? Thanks