starkweatherr,
Hopefully, instructions will come with your new 6 volt alternator. It is a single wire unit, so that's all you will need...a single wire! You won't use the voltage regulator anymore, but if the truck has a functioning ammeter that you want to utilize, you can tie the BATT output of the alternator to the BATT wire on the old regulator, then wrap the remaining wire up, remove the regulator and you're done.
Your previous comments about the coil, ballast resistor and battery lead me to believe that this rig was almost already converted. If this is true, you are going to have to change all this stuff back to 6 volt components. How about the headlights and other misc lamps...they will be very dim on 6 volts if they had been swapped to 12 volts.
Read your 'new alternator' instructions and keep us posted on the outcome.
When you are dinking with the regulator, take a look at how many terminals it has. If it has four terminals, it was installed along with the alternator and wasn't a relic left over from the generator era.
Stuart
