RawbDidIt
I'm Awesome
Fusible link is different then a fuse. It's a lower gage wire cut at a specific length that burns up in the event of over current. Same function as a fuse, but it looks like regular wire. Peel back the cable shroud and you'll see the different gage. On my truck there's a ground strap on the frame rail next to the starter, grounds to the block next to the starter. You can do 6ga, but if you ever change your mind, you'll end up just redoing all that work. If you're definitely never running sound or aftermarket lights, 6ga is fine, but in my mind the price difference between 4ga and 6ga is more than fair compared to the performance. That being said, I'm also running sound and planning for aftermarket lights. 6ga will run anything that alternator will, so if you're never going over the 110A mark, you'll be fine, but you'll want to put a fuse in on the power side between battery and alternator.
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