I just replaced the CS 130 in my 59 with a CS130D.
I got bit by the alternator fan one too many time with the regular CS130.
This is what I will say
CS130---world of difference over the old 12SI alternators
Has the power to run everything on my 59 but did not really maintain 14+ volts at cruise with the AC and electric fans running (did keep the battery charged up tho).
CS130D (internal fan) I just put on the 59 (and also my 66 elky) seems to be able to keep up with high loads at idle.
After changing the alternator, I started the car, and immediately turned on:
Heater fan on high
Both engine cooling fans
(car has two electric fuel pumps)
And even started running the windows up and down.
On a cold car still trying to hit on all 8 cylinders, volts never dropped below 13.8 at idle.
Turned everything off and had a steady 14.4.
Yep---the CS alternators are up to the task