The sketch was only made for my notes at the time, so that is why it is so messy.
I did the ammeter parallel wire bypass upgrade to relieve some of the amperge thru the bulkhead connector. I feel safer with this wiring change with the higher amp alternator. This change was done before this issue came up.

Thanks dave.

Robert,
This one kicked my butt!!

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EDIT:
Since I have posted this response, I have started up the car several times and the ammeter and both voltage guages are rock-solid at idle. The diode on the small red wire worked great.
Note: If you experience engine run-on or any voltage fluctuations with the MSD box, please consider using the diode that comes in the kit on the small red wire.

Last edited by YO7_A66; 03/01/12 08:45 AM.
1970 YO7 A66 [Canadian Export] F8 Challenger
340 (Currently in shop for stroker assy.)