This is the safest way to wire it up. Uses a ford solenoid and a S605 continuous duty relay on the alt line.
I agree, I'm right with ya on that one. I've a Caterpillar 12 volt solenoid and 60 amp continuous relay also from caterpillar ready and waiting
If you are using the factory wiring/alternator, you need to make an adjustment for the alt field sensing wire.