No charge

So you have replaced the VR? Only two more things I can think of. Either the green wire goes from VR F terminal to the alternator Field is open/ shorted or the thing is not getting battery voltage from the ignition switch

Unhook both ends of the green, at the VR and the alternator F terminal. Should show zero ohms from one end to other, and infinity (open) to ground.

Double check that with everything hooked up "normal" you are getting 12V at VR IGN terminal, and "some" voltage at the green F terminal at the alternator. Again, this is with all wiring connected

"New" does not mean "good." (functional.) You might have a bad VR, or something unforseen----careless short, etc, may have destroyed the new one.

You might want to do an alternator field current test. Look in your service manual, the section on charging system in chapter 8 Should draw somewhere between 4--6A just off the top my head