Ammeter to Voltmeter conversion

Yeah I know my car charges a little high now too, see's about 15 volts at idle to about 15.5 with rpm.

18 is definatly much, I put in a new voltage regulator as well but still the same. Might have to look into an alternator like yours.

Did you just leave the wireing and such for the regulator on the firewall intact for show?