I upgrade mine to a 110 amp GM alternator the hardest part was getting the wiring right for all accessories to work but we solved that right away. I have a 1980 toyota 4x4 pickup and after the original alternator died and the remanufactured one was bad returned it and the next one was bad too I bought the GM one it was 50 dollars cheaper and more common than the older yota's so now all i got to do is take it to the store and buy a cheap 30.00 on the shelf alternator verses a 80+ one that has to be special ordered