[AdamIsAdam]

Originally Posted by studebaker53

temporarily disconnect tachometer and see if problem persists. I had same problem years ago and the tach was getting hot and shorting out ignition system thus the killing engine.

I was thinking the same thing.

I found the factory wiring schematics onto which the builder notated where he connected the MSD gray to the harness' purple which then goes to the tach. Of course, it's not a simple plug that I can unplug, it's hard connected. This would all be a lot easier if the darned thing wasn't so darned small behind the darned dash and the interior in general! At least the darned thing doesn't take up much space in the garage! lol Just venting.

(Before I start cutting wires, I want to figure out how I can access the wires to re-crimp them later.)

I'll play w/this all this week and report back. Thanks all for your suggestions.