Which alternator 60A or 46A?

Go with the higher amperage. At the lower level, the radio, lights, wipers used all at once can cause dim lights on the road. If you have a high energy ignition and/or car stereo amp, the problem gets even worse. At this level, 60 amps maybe marginal with all the extra load being used at once.

LOL! Remembering the old days when I had to turn the stereo off during a rain storm just to be able to see the road. Scary days....