Good Method to Add Wiring For Add-Ons

If you were adding more relays like say for headlamps and IGN power, I'd suggest installing a fuse/relay box from a later car. I used a 1990's Jeep one in my 3 Mopars, which gives 7 relays and many fuses, but a lot of work. I also used those to replace the factory starter and horn relays on the firewall to minimize clutter. Since you are only switching a fuel pump, stick with a single 30A Bosch relay. Cleanest are the type which have a weather-sealed base. Radiator fans might get by with a regular 30/40 Bosch relay, but most factory cars use a custom relay. I used the same solid-state PN as in my 1996 minivan which switches 2 hefty fans in parallel. It wires simply like a Bosch relay (2 control wires, 2 power wires). Don't make a mess of the wiring. Plan ahead. Many use split-loom, which is easy to modify if you need to add a wire. Cleaner is smooth plastic sheathing which you pull the wires thru, but doesn't work well if terminals already on them. Many use nylon mesh which can be expanded in diameter like a Chinese finger trap to fit over connectors, then pulled out for a clean small diameter. But, it can collect grub and is quite pricey. For wire passing hot exhaust pipes, you can buy "firesleeve" tubing of fiberglass insulation w/ silicone jacket.