Look carefully for regulator vs. non regulator units. My 95 eclipse alt is 120 amps if I recall and is externally regulated. The regulator is in the computer. A year or 3 earlier the alternators came with internal regulators but looked almost the same. My computer went bad and 3 rebuilt ECMs later the rebuilder still couldnt get me one with a good regulator in it. I ended up bypassing the regulator in the computer and used a VR733 (1970 to mid 80s mopar electronic regulator) that "Bill Me Later" above mentioned. I prolly did it....5 or more years ago. Still Works perfectly. Output is around 13.8-14.5 volts. MAKE SURE the regulator case is grounded well to the body! A couple ppl online mentioned some of the cheaper versions with a zinc like finish on them didn't make a good ground. And for god sakes...bypass the ammeter if you're upgrading to a 75-100amp or more!! Otherwise....you'll need to carry a fire extinguisher and marshmallows just in case!!