Have a local shop that will rebuild my stock original (1101 349 120A) alternator. ran the car with lights on and the defroster and the pulsing was crazy so want to refurb it but keep the case as it date matches the car. They offer a 160 or 180 amp upgrade at a significant increase in price. I Have a larger fuel pump and normal adds ons but do not have any radio upgrades. I could see if I was running some larger amps, but I do not.Is the 120 amp good enough or would it be worth the money to increase the output? Ideas?