Have you done the wiring fix for the high amp alt?
That is what is stopping me from the update.
I took my alternator to a shop that only rebuild alternator,generator and starters. he said that they could put a different part in it and it would fix the no charge at low idle. That's why i can run the larger pulley, and still charge at idle in gear.
Someday it will happen. Have also been told that they take less HP to run even though they Charge Way More Amps.