Burnt some Spaghetti!

unclepunchy said

Oh man, this is super helpful - I will go over it in detail after work. Thanks so much.

FYI: I just pulled out about ten miles of crap wire from those gauges - the last guy had wired everything with low gauge wire when it should have been 12 gauge and 14 gauge in some cases. I disco'ed all of it. The back of the ammeter wire was melted -no suprise. I am just going to run all the factory gauges in the dash and add an RPM and Oil pressure for now.

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Oh Boy!

Yes. That should be 12 gage and a good crimp. Seeing your location, 12 AWG or even 10 AWG Marine wire if you can crimp it will be less prone to oxidation from the salt air.

The ammeters on the rally instrument panel seems to have been generally problem free, but any of them can get abused.

Since your car already has a hole in the firewall, if your not doing a full resto, then consider a making your own version of the factory heavy duty wiring. Also with a '73, you may find an connector in the engine compartment that can be eliminated. Apparently it was added to ease production, but is another point of resistance and vulnerbility to the alternator output and the ignition circuit.