If you're sure about those stator readings, esp the short to (a good) ground being OL...they sound OK. Clymer's for the stator, bc the stator is still OE, right? AC voltage at idle should be anywhere from 15~20vac, I think.
But...seeing as how you put in a new RR, IIUC from your OP, and have cleaned connections and checked for shorts/discontinuity, try
one more stator AC test....connect the meter, start the engine and gradually run it up to 5k rpm or so. Your AC readings should be the same or very close on all three legs, and you should be seeing somewhere between 50~60+vac at 5k rpm.
If you get this result...well, I don't think it's the stator.
I'm doing this from memory, but IIRC there is a bullet-connector white/red charge wire under the right cover that goes to the + battery terminal. Make sure this is connected and clean....
The higher rpm AC test will more or less confirm the status of your stator, given all the other, positive readings.