Pulled the blue terminal off of the alternator to get a better reading on it, got varying levels depending on where I put the probe, cleaned it off with a wire brush.
.24 Ohms is getting to the lower limit of what a standard meter can read.
If the terminal on there is OK (I have a predjudice against those cheap squeez connectors) then there should have been power flowing through.
That will have to be tested live as @67Dart273 described.
Since you have the brushes off, you can measure the rotor's resistance from slip ring to slip ring. Off the top of my head it should be about 3 ohms.
I say that not knowing if you can really get a probe into both brush locations with the alternator on the engine. With a slant six it may be possible.
When you reassemble, it is critical that both brushes go into their insulators, and that the screws have thier insulating fiber washers.