Ammeter to voltmeter conversion

I am going with a new wiring harness from classic industries, it is supposed to match up to the stock system except for the ammeter issue. Hopefully I will be able to figure it all out. Its a long term ground up project so I can take my time and study things out as I go
Thats fine.
70dart340 seems to have concerns about the stock scheme even though he's not modifying the loads. Seen a few guys scared into making 'improvements' and shooting themselves in the foot. Figured he need a little moer input so he can evaluate his car's situation and decide what applies.