Another alternator problem

Unfortunately, the design of those stock style case alternators whether they are OEM or aftermarket is total garbage.

You will be a lot better served by converting to a Delco or Denso style alternator. Not sure what works well on a big block for fitment, but I 12SI alternator swapped my Duster, just a basic parts store one in 2011 and it has been flawless. I always had trouble with the Mopar alternators and regulators. If I was on the road and had a failure I would be able to grab one anywhere for under $100.