I call BS.
Some years ago, I complained to Standard Motor Products about defective Chrysler voltage regulators (internals were not connected to the case to make a ground). My local store (Advance) had three of them, and another store over 80 miles away had at least one. Standard told me they knew about the problem. That they had changed suppliers (didn't say if that was before or after). Those regulators stayed on my local store shelf for at least two months longer. About three months later, I found they had been "repaired". Someone had put a sheet metal screw into the case, so the under side of the screw head contacted the retainer bail, allowing a ground. I wonder what happens, when some corrosion forms under the head of the screw?
How about the "new" Mopar small block distributers, from A-1 Cardone? Ever buy one of those. You need to buy three and maybe you will get one good one.
