Great stuff! I wanted to have my alt natural like yours are, but looks like black is correct for 65. At least I have 2 examples of them being black so that is what I went with.
As far as not charging, its pretty simple to check. First, the right side brush stud terminal (looking from the back) on the back must have a jumper to ground. If its not there, then you need to put one in.
The second is the field wire (left side brush stud terminal) on the alt - it goes to the fld terminal on the voltage regulator. Use an ohmmeter to verify that wire.
Third, with the key on, make sure you have 12 volts to ground on the ign terminal on the voltage regulator.
Last, make sure the main stud (+) has 12 volts to ground on it - it should go to the battery via a fusible link.
If all of that is good, then with the car running, measure voltage on the left side brush stud terminal (field wire)l on the back of the voltage regulator to ground. If not charging, then it should be around 12 volts to ground. It would point to an alternator problem.