Are you building it with track use in mind where you have to meet NHRA rules or just as a general relocation for a street car? I did my relocation on the cheap using junkyard cables from cars with factory rear mounted batteries(Lincoln LS) and simply modified the stock battery tray. Positive runs from the battery to starter then starter to fuse box and negative is bolted to a convenient grounding bolt right by the new location. I use an AGM battery so I don’t see the need for a ventilated box or firewall and I didn’t wire up a kill switch so it’s not exactly tech legal. But I wanted a trunk mounted battery and its benefits and I got it,
Either way I see no need to have the fuse/relay panels relocated to the back unless you’re rewiring from scratch.
Either way I see no need to have the fuse/relay panels relocated to the back unless you’re rewiring from scratch.