I have a 69 coronet with a 440, MSD ready to run distributor, MSD 6A, HVS2 coil, dual electric rad fans, vintage air, and 30A round back alternator with old mechanical style voltage regulator. My battery keeps losing voltage after driving a while. With a meter on the battery posts, the volts go up to 12.5 or so when I rev the engine a little, so this tells me the alternator is working. I ordered a squareback alt with dual field terminals, and a newer "flat style" voltage regulator. I plan on running a heavy wire from BAT terminal on alternator to the battery. Do I ground the extra field wire, or do I tie it into the blue/brown wire feeding the voltage regulator? I've heard both answers. My MSD box 12v IGN wire, distributor 12v IGN wire, factory blue "run" wire, and factory brown "start" wire all connect to line side of voltage regulator. Is this correct? I also have a violet wire going from BAT terminal on alternator to the horn relay per wiring diagram, is this needed?