What do I need to do my electrical system in my dart.

Dave_J said
I copied this many years ago. I added a 1-0 Gauge welding wire from the trunk to the engine block.

1 gauge wire will work for most with out all the forward electronics, but 1-0 is GOOD overkill. 2-0 is more overkill and not really needed, is extra heavy, but only about 2 pounds more. It is $$$ more too.

The below is just the diameter of the copper, not the sheath. Sheath diameter can be very deceptive.

1 Gauge is 0.289 Inch or 7.35mm
1-0 gauge is 0.325 Inch or 8.25mm
2-0 gauge is 0.365 inch or 9.25mm

View attachment 1716300507

I wonder if there's an advantage of going this route (above) vs. the one commonly posted on this site originally from @crackedback Rob. Looks like the one above eliminates the CD relay.

Edit - I guess the advantage of running the CD relay is that once the cutoff switch is thrown, it kills all power forward to the car. Using the MAD method shown above, the alternator line is always hot.