6 to 12 volt conversion

I'm converting my 860 to 12 volt. Any feedback on my wiring diagram would be greatly appreciated. Thanks in advance.
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Your diagram doesn't show an actual ground cable from the battery
but I think that can be assumed. Voltmeter neg can go to chassis.

Assuming a 1 wire Delco alternator setup, the only other thing I
see at first glance is that I would use a 12V coil that doesn't
require an external resistor (NAPA IC14SB or equivalent) and
eliminate the resistor. Less connections, less corrosion, less problems.
 
The neutral safety switch is a push button grounding switch to engage the solenoid that will only push down with the transmission in neutral. He has it connected properly.

Mark
 
(quoted from post at 07:52:53 02/13/20) Thank you. You have the alternator wire going to the key switch- I have it going to the hot side of the solenoid. Is my method an issue?

hightech1953's circuit drawing is using an amp meter instead of a volt meter. An amp meter needs to be in series between the alternator and the battery to show the current, but a volt meter needs to be in parallel with the battery, so yours is correct for a volt meter.
 
Changed my 640 over to 12 volt last fall. Read alot about the 2 different types of alternators and decided to go with the 3 wire over the single wire. My understanding is the 3 wire will charge at pretty much any RPM. Whereas the single wire needs to be revved past 1700 RPM (or so) to initiate its charging circuit every time the motor is started.

Please chime in if my info is incorrect.
 

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