Alternator Amp Size?

yellow rose said

Any reason you want to go to the Pertronix? I have one in the shop right now and I'm not all that impressed. Maybe after I spin it up I will be, but the Chrysler distributor is pretty hard to beat.

About the original question..I'm on the fence about a bigger alternator. Modern ignition boxes use a good amount of power and I suspect at lower RPM's I'm no powering the box enough.

I'm not all that anxious to bypass the ammeter if I can avoid it.

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I'm considering the PerTronix just because a friend likes how his engine bay looks original, other than the 2nd wire from the distributor to the coil. If there's a performance advantage with it, that would be a plus. However, if the external ECU (orange box) is more reliable I would lean in favor of it. I really think the external ECU and extra harness is widely used and accepted for engine bay appearance in these cars. Would you agree?

I also would rather not bypass the ammeter. The only addition to my car's system is the 8 track player and the radio would be off when it's used, obviously.