I also have a few more questions (as if you didn't have enough to think about, lol). Will the wires passing through the bulkhead be OK as long as I replace the wires and install new terminals with dielectric grease, or should I just run the wires straight through the firewall? Also, should I hook up the gauges to the terminal on the fuseblock that is designated for the gauges? It's a fused terminal.

Thanks so much, Nacho!!!