Wow! That is one sweet ride! Love the rims with that low profile rubber! I would recommend fuses on everything, and use an all metal case this build.
I'm going to re-evaluate everything on my ride now, and make sure I have fuses on everything just so I dont experience what you did with your previous build. Do you remember what power supply you had in the F150? I want to make sure I don't have one of those in my carpc.