[Lattimer]

I wired in my ammeter when I swapped my gauges, so I never had original wiring.

Larger wire won't hurt a thing ever, just don't go smaller than original.

I used 2 parts store fuse holders for the standard glass fuses, and used 5 amps for both. No issues for a year now.

You can use any style fuse you want, they all do the same thing. I went with the glass ones since the fuse box in the truck is original and I wanted all the same style.