Bolters -

Need a little help in diagnosing a recent issue. Have a 54 3100, still 6v. All was fine, until recently, when driving the ammeter pegs to Charge. If I come to a stop then at idle, ammeter moves to center. There are moments when it will fluctuate from the center to the far right, but mostly likes to sit all the way to the right.
Generator and Voltage regulator are re-built/new. When put back together about 10 months ago all was well. No other electrical issues, truck starts right up every time.
Appreciate some guidance on figuring this one out as
Electric issues for me are always challanging.
Thanks
Joe