Back in 2011 I replaced my original 55A alternator with a 63A internally regulated alternator from CK

My original ammeter works as normal. Something to look out for, depending on how your alternator is mounted, is that the self-regulated alternator is 'fatter' than the original and in my case it contacts the valve cover before I can move it far enough in to remove the belt from the pulley. I tried using a next-size-up belt, but this made contact with the nose of the power steering pump, so I now have to slacken the water pump pulley to change the alternator belt.
Chris Sale
'64 Coupe