[magwakeenercew2jh]

Just in case anyone was following this, after reading 67 Chevelle's data, "listening" carefully to what VetteVet wrote, and making various trips out to the truck to verify
what age does not allow me to remember, I decided to call M & H, whose wiring harnesses I use (562-926-9562 just in case you want to "talk" to someone about one of their harnesses),

Here's what the cool tech said after I was as inarticulate as always:

"Oh, sounds you're converting from an externally regulated to an internally regulated alternator."

I said, "Yes, that's what I did.", "And it worked perfectly well for 400 miles."

I went on, "But there doesn't seem to be a connection to the white wire where it comes off the one-wire adapter from the alternator." "It only looks like it connects to the blue one before
it goes into the Voltage Regulator Delete rubber thingy" (not sure if "thingy" is a proper technical term).

He said, "Oh." "It also sounds like you have a CS style Alternator." "The white wire is there only to be hooked up if you use an SI type of alternator."

Problem solved. Love those guys.
And more thanks you you all, too.